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Current Issue
2011 Vol.1 Issue.22/24,
Published 2011-11-15
1
Analysis of Vegetable Price Fluctuating Characteristics in Beijing and Influencing Factors
PAN Feng-jie，MU Yue-ying
Taking vegetable price fluctuation in Beijing as study object，this paper collects the overall vegetable price and prices of various varieties from June 2007 to January 2011，and analyzes the long-term trend，seasonal fluctuation and unusual fluctuation，etc．vegetable price fluctuating characteristics．On this basis，this paper also analyzes the influencing factors for vegetable price fluctuations in Beijing and carries out empirical studies．The validation results show that vegetable market amounts，price of agricultural production facilities，seasonal factors，and natural disasters can affect the vegetable price in Beijing．
2011 Vol. 1 (22/24): 1-7 [
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1127
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868
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8
Distribution and Comparison of Advantages Regions for Vegetable Production in Beijing
MU Yue-ying，ZHAO Shuang-shuang，ZHAO Xia
Grey system assessment method is used to develop a quantitative evaluation on the comparative regional advantage for vegetable production by employing 6 vegetable categories data based on 13 counties of Beijing from 2007 to 2009，which takes natural，economic and social factors into account．The results indicated that vegetable production in Beijing has remarkable regional characteristics．The districts and counties with comparative advantages in vegetable production are Shunyi district，Daxing district，Tongzhou district and Pinggu district．At the same time，each district has ascertained its own fruit vegetable types with comparative advantages．
2011 Vol. 1 (22/24): 8-12 [
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1002
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284KB] (
686
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13
Production Efficiency Analysis of Solar Greenhouse and Plastic Big-arch Shelter in Beijing
LI Zhong-ming1，SHEN Jun1，WANG Zhong2，GAO Li-hong1，CHEN Qing-yun1 ，GUO Yu-xiao3
From April to August 2010，we visited 804 practitioners（791 households and 13 enterprises/cooperatives）in 13 counties，63 towns and 124 villages，and investigated the overall situations and economic efficiencies of solar greenhouse and plastic big-arch shelter from 2009-2010．The results showed that the input-output ratio of edible fungus，flower and strawberry were higher than vegetables and melon in solar greenhouse，of which the annual yield benefit per hectare of edible fungus was the highest- 538 430.1 yuan|vegetables gained the lowest-120 046.35 yuan per hectare．The average benefit of plastic big-arch shelter was far less than the solar greenhouses，in which vegetables were 34.29% lower than in solar greenhouse，melon was 28.94% lower．The solar greenhouse is more possible to gain high efficiency than plastic big-arch shelter．The lowest proportion of high-efficiency gained by vegetables in solar greenhouse is 7.14%，while in plastic big-arch shelter is only 3.06%．Multiple crops benefits were significantly higher than one big crop both in solar greenhouse and plastic big-arch shelter．This paper puts forward suggestions of optimizing planting structure，reasonably arranging crops，strengthening technical training，improving crop yield and quality，exerting cooperative’s advantage，and expanding sales channels.
2011 Vol. 1 (22/24): 13-19 [
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2523
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20
Analysis of Winter Temperature Traits in Common Solar Greenhouse in Beijing Areas
LIU Si-ying，DAI Xi-nan，HUANG Long，XIE Xiao-lu，GAO Li-hong，QU Mei
This experiment used 4 common types of solar greenhouse as targets．Their back wall materials from the inside to outside are 37 cm brick+10 cm polyphony board+24 cm brick，20 cm ceramic brick+10 cm perlite+20 cm ceramic brick，Shouguang type loam wall，37 cm brick+12 cm polyphony board，respectively．According to the structure parameters and building materials of these 4 types solar greenhouses，we analyzed their lighting angle and heat preservation functions，and measured the indoor and outdoor temperatures of the solar greenhouses in winter of 2010-2011．The results showed that the temperature of Beijing in winter of 2010-2011 is normal but leaning to cold．Thermal resistance of the greenhouse with 37 cm brick+10 cm polyphony board+24 cm brick back wall is 3.41 m2 K W-1．The average indoor temperature is 14.4 ℃．The average night temperature is above 10 ℃．The lowest temperature is above 6 ℃．The average temperature inside of Shouguang type greenhouse is 12.4 ℃．The average temperature at night is above 8.4 ℃．The lowest temperature is above 4.6 ℃．These 2 types of solar greenhouses can ensure the fruit vegetables production in winter．Greenhouses with 20 cm ceramic brick+10 cm perlite+20 cm ceramic brick and 37 cm brick+12 cm polyphony have lower indoor temperatures．The lowest temperature is around 0 ℃．The average temperature at night is between 5-7 ℃．They are only good for cultivating cold-tolerant leaf vegetables in winter.
2011 Vol. 1 (22/24): 20-25 [
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2055
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26
Investigation on Vegetables Production and Management Situation in Famer Household Solar Greenhouse in Shouguang of Shandong Province
LI You-li1，ZHAO Zhi-wei2，GAO Li-hong1 ，GUO Yu-xiao3
Shouguang is named as hometown of vegetable in China．It is not only because of its successful planting of vegetables in winter-type greenhouse，but also owing to its long history of growing vegetable with high level of production，good management skill，rich experience and spirit of continuous creatiion．In this paper，we investigated，summarized and analyzed the roles of solar greenhouses structure，production，management and market，etc．factor in ensuring the high-yield and high-efficiency vegetables production in farmer househould solar greenhouse.
2011 Vol. 1 (22/24): 26-30 [
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1388
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31
Effects of Integrated Rootzone Management on Greenhouse Tomato Growth and Nitrogen Utilization
LI Jun-liang1，ZHANG Jing-wei1，WANG Li-ying2，3，JIN Sheng-ai1，CHEN Qing2
The effects of two treatments，including rootzone water and fertilizer management（W2FS）and integrated rootzone management（W2FR）on tomato（Lycopersicon esculentum Mill.）yield，root growth，N utilization and soil Nmin residue were conducted in greenhouse tomato system in Shouguang．The results showed that significant reduction in the amount of water and fertilizer input were found in the W2FS and W2FR treatments compared to conventional treatment，indicating the reduction of irrigation amount by 29% and the reduction of fertilizer amount（N-P2O5-K2O）by 59%，23%，42% and 79%，78%，48%，respectively．Integrated rootzone management（W2FR）significantly improved root growth and development. Compared to W1FC，W2F0，W2FS treatments，the total root length in W2FR treatment increased by 57%，42% and 46%，root surface in W2FR treatment increased by 62%，34% and 36%，and root volume in W2FR treatment increased by 70%，29% and 29%，respectively．The partial productivity of fertilizer（N-P2O5-K2O）increased by 4.0，3.7 and 1.0 folders with integrated rootone management（W2FR），in comparison to conventional management．Intergated rootzone management technology can improve the use efficiency of fertilizer and decrease the risk of nitrogen leaching．
2011 Vol. 1 (22/24): 31-37 [
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1010
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38
Effects of Different Cultivation Mode and Cultivation Systems on Soil Environment
ZHANG Xue-yan1，2，TIAN Yong-qiang2，GAO Li-hong2 ，GUO Yu-xiao3
Taking soil being planted over 30 years as material，we compared different facilities including greenhouse，big-arch shelter，open field，and different cultivation systems including continuous cropping，catching cropping and rotation cropping on soil nutrition，soil enzyme and soil microbe．The result indicated that that the soil EC value，total nitrogen，organic matter，available nitrogen，available potassium，nitrate nitrogen content，sucrase，neutral phosphatase，catalase in continuous cropping were significantly higher than that in catching cropping in greenhouse（S1），continuous cropping in big-arch shelter（S2），rotation cropping in big-arch shelter（S3）and open field planting（S4），while its pH value was significantly lower than the other treatments．In S4 treatment，the available nutrient，ammonium nitrogen content，catalase activities were remarkably lower than other treatments．Comparing with S2，S3 could reduce the accumulation of available nutrient，ammonium nitrogen and nitrate nitrogen，and increase bacteria，fungi，actinomyces population significantly. According to correlative analysis，the soil nutrient contents，except available potassium were positively correlated with soil EC value，but had negative correlation with pH value．The sucrase，urease，neutral phosphatase and catalase activities had correlation with soil nutrient content．The bacteria population had negative correlation with available potassium，and bacteria and actinomyces population had remarkable negative correlation with ammonium nitrogen content．In conclusion，open field planting was the most effective way for maintaining soil quality．The soil quality in big-arch shelter was between the greenhouse and open field．Catching cropping in greenhouse and rotation cropping in big-arch shelter could improve by different degrees the soil quality both in greenhouse and big-arch shelter，separately．
2011 Vol. 1 (22/24): 38-44 [
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833
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45
Effects of Summer Catch Sweet Corn and Straw Amended on Soil Microbial Community of Greenhouse Tomato
ZHAO Xiao-cui1，LIU Peng-peng2，WANG Qian1，WANG Jing-guo2，CHEN Qing2
We selected the fallow and catch crop treatments in a 3-year old experiment about greenhouse tomato（Lycopersicon esculentum Mill.）in this experiment to study the effects of summer fallow mode and sweet corn planted with straw application mode on soil microbial community structure in different growth stage by applying phospholipid fatty acid（PLFA）analysis and testing technology．The results indicated that compared with the fallow treatment，catch crop，sweet corn planted with straw returned to the field mode could improve microbe in soil of greenhouse tomato．Especially during the blooming period of fall and winter greenhouse tomato，catch crop treatment could increase soil microbial biomass PLFAs content，fungi and bacteria PLFAs content by 18.2%，17.9% and 23.6%，respectively and the Shannon-Wienner H reached 2.07 in the fruiting period，which was increased by 99.04%，compared with fallow treatment．
2011 Vol. 1 (22/24): 45-50 [
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1161
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51
Effects of Substrate Micro-fertilizers Treatment on Cucumber Root Zone Environment and Yield
Maimaitituxun Rouzi1，Xianmisiya Tayifu2，LI Juan1，GAO Li-hong1
Substrates were treated with various amounts of Bacillus amyloliquefaciens，Glomus Mosseae and a commercial bio-fertilizer called Bio twice prior to sowing and after transplanting，in order to figure out the effects of those micro-fertilizers on cucumber（Cacumis sativus L.）root zone environment and yield．The results of 3 constant seasons’ experiments showed that Glomus Mosseae can slow down pH value from raising too fast and can increase EC value in adequate range．Bacillus amyloliquefaciens can significantly decrease the numbers of bacteria，while increase actinomycetes numbers．Bacillus amyloliquefaciens，Glomus Mosseae and Bio can increase root length by 57.1%，51.8% and 44.9%，respectively．They can enlarge root surface areas by 56.5%，51.5% and 44.3%|in addition，all these 3 treatments can increase root volume by 35.4%，82.3% and 61.1%，comparatively．Different micro-fertilizer treatments can improve cucumber plant yield，Bio and GM treatments have remarkable effect on yield increase.
2011 Vol. 1 (22/24): 51-56 [
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1025
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57
Effects of Biogas Waste on Solanaceae Vegetable Growth and Soil Nutrient Accumulation in Greenhouse
KANG Ling-yun1，ZHAO Yong-zhi2，QU Ming-shan2，CHEN Qing1
As the byproduct of biogas projects，biogas wastes have the advantages of multiple nutrient and stable supply．Greenhouse vegetable field may be the main consumptive place for biogas waste．Greenhouse experiment with double cropping system was carried out to study the effects of partial chemical fertilizer substituted by biogas wastes on solanaceae vegetables growth and soil nutrient accumulation．The results showed that no significant differences were investigated in vegetable growth and fruit yield among different treatments with different proportions of biogas wastes and chemical fertilizer．It means that if the chemical fertilizer is completely substituted by biogas wastes，it can still meet the crop nutrient requirement．However，the accumulation of phosphorus in soil surface layer and the risk of nitrogen leaching might occur．Therefore，it is necessary to pay more attention to environmental problems in long-term application of biogas wastes，and special attention must be paid to limit the annual amount of biogas wastes application．
2011 Vol. 1 (22/24): 57-62 [
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1136
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642KB] (
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63
Effects of Built-in Straw Biological Reactor Technology and Microbial Agents on Solar Greenhouse Soil Temperature and Winter Tomato Growth
PENG Xing-min1，CHEN Zhi-qun2，CHEN Qing-yun1，TONG Er-jian3，XU Kai3，GAO Li-hong1
A field experiment was conducted to study the effects of microbial agents and built-in straw biological reactor technology on solar greenhouse soil temperature and the growth of winter tomato（Lycopersicon esculentum Mill.）．The results showed that after using the microbial agents，built-in straw biological reactor technology and both methods can increasing soil temperature by 0.28，0.85 ℃ and 1.23 ℃，respectively．The built-in straw biological reactor technology，and applying both of them could dramatically speed up the winter tomato growth，and increase the tomato yield by 10.7% and 11.8%．
2011 Vol. 1 (22/24): 63-67 [
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1394
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284KB] (
670
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68
Studies on Physicochemical Property and Seedling Culture Effect of Caragana Included Substrates
SUN Jing，Maimaitituxun Rouzi，QU Mei，GAO Li-hong
Caragana Korshinskii Kom was chosen to be used with very good results as growth media instead of peat．The parameters of the compound substrates were tested，including bulk density，total porosity，aeration porosity，water-holding porosity，porosity ratio，and pH and EC values．Experiments were conducted with cucumber‘Jinyu No.5’nurseries using caragana-included substrates．Rate of emergence，seedling dry and wet matter were also tested to figure out the effects that caragana had shown upon cucumber seedling．The results indicate that 50% of caragana-included substrate，being thoroughly decomposed，has the best quality for cucumber seedling，as compared with the traditional peat substrates．So the caragana-included substrates are feasible to replace peat substrates．
2011 Vol. 1 (22/24): 68-71 [
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947
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72
omparative Analysis of Radiative and Temperature Environments between PO and PE Greenhouses
CHENG Qiang，LIU Si-ying，QU Mei，GAO Li-hong
The radiative and temperature environments of PO and PE greenhouses in winter were examined to compare and evaluate the influences of PO and PE films on radiative and temperature environments．The results indicated that the transmittance of solar radiation in PO greenhouse is 4.5-4.7 percentage point higher than that of PE greenhouse．The average daily temperature，the highest temperature and lowest temperature in PO greenhouse is generally 1 ℃ higher than in PE greenhouse．The temperature difference in sunny days in PO greenhouse is bigger than in gloomy days．It might up to over 2 ℃，and PO film has very good heat-insulating property．The 10 cm and 20 cm ground temperatures in PO greenhouse can be maintained between 13-18 ℃，2 ℃ higher than that in PE greenhouse．
2011 Vol. 1 (22/24): 72-77 [
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1492
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78
Studies on Different Cultivation Systems on Soil Long Term Repair Effect of Continuous Cucumber Cropping in Solar Greenhouse
WANG Xu-hui1，ZHANG Xue-yan1，2，WU Yan-fei1，GAO Li-hong1
We utilized pot culture for 7 successive years to evaluate the repairing effect on continuous cucumber（Cucumis sativus L.）cropping soil by different cultivation systems．In the first 4 years，summer catch garlic and crop rotation（tomato—pakchoi—cucumber）could continuously improve the soil quality．All treatments could solve the problem of soil secondary salinization by different degree and increase the fall and winter cucumber yield．But since the 5th year，the soil EC and pH values，contents of nitrogen，available N，K and P，Fusarium oxysporum population had begun to increase slowly and the fall winter cucumber yields by all treatments were lower than the CK．All in all，under the condition of this experiment，up to the 4th year，the repairing effects of different cultivation systems were stable，but they began to be puny since the 5th year．
2011 Vol. 1 (22/24): 78-83 [
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868
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84
Comparison between Fungicidal Activities of Cis-1，3-dichloropropene and Trans-1，3-dichloropropene in the Laboratory
MAO Lian-gang1，2，YAN Dong-dong1，2，XIE Hong-wei1，2，LI Yuan1，2，3，WANG Qiu-xia1，2，3，GUO Mei-xia1，2，3，CAO Ao-cheng1，2，3
Fungicidal activities of cis-1，3-dichloropropene and trans-1，3-dichloropropene in the laboratory were evaluated for further application in the fields．Fungicidal activities of cis-1，3-D and trans-1，3-D on 8 kinds of plant pathogen fungi were tested in the laboratory with the improved growth rate method．The laboratory results showed that fungicidal activities of the 2 fumigants were different and the values of EC50 were trans-1，3-D＞1，3-D＞cis-1，3-D．Cis-1，3-D was better than trans-1，3-D against the plant pathogen fungi，but further studies on field trials should be conducted．
2011 Vol. 1 (22/24): 84-87 [
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966
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527
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88
Chloropicrin or 1，3-Dichloropropene Residue Detection in Cucumber and Tomato after Applying Chlropicrin and 1，3-Dichloropropene Capsule
WANG Qiu-xia，GUO Mei-xia，LI Yuan，CAO Ao-cheng
After applying chlropicrin and 1，3-dichloropropene capsule on cucumber and tomato，they were not detected（under LOD）in all samples of cucumber and tomato，using headspace gas chromatography to measure their residues．This showed that the food is safe after applying chlropicrin and 1，3-dichloropropene capsules for soil fumigation．
2011 Vol. 1 (22/24): 88-91 [
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1190
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853
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92
Effects of Different Irrigation Modes on Pepper Growth，Yield and Water Use Efficiency
CHENG Ming1，ZHOU Ji-hua1，AN Shun-wei1，JIA Song-tao2，HUANG Yi-hua1，WANG Zhi-ping1
Effects of 3 irrigation modes including trickling irrigation under mulch，furrow irrigation above mulch and furrow irrigation under mulch on the growth and yield of pepper（Capsicum annuum L.）‘Nongda 602’were studied．The results showed that water consumption of trickling irrigation under mulch was ranked the lowest，while its pepper yield and water use efficiency were ranked the highest respectively．Water use efficiency of trickling irrigation under mulch was 2.04 kg m-3 and 1.81 kg m-3 higher than furrow irrigation above mulch and furrow irrigation under mulch，respectively．Thereby，trickling irrigation under mulch was the preferable irrigation mode for autumn-winter greenhouse pepper．
2011 Vol. 1 (22/24): 92-95 [
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1150
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284KB] (
1041
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96
Impact of Different Emitters on Tomato Yield and Water Consumption in Solar Greenhouse
ZHOU Ji-hua1，CHENG Ming1，JIA Song-tao2，AN Shun-wei1，WANG Zhi-ping1
Impact of different dripping emitters on tomato（Lycopersicon esculentum Mill.）growth，yield and water consumption in solar greenhouse was studied with the control of tension- meters．The results showed that the plant height of tomato increased significantly in Netafim drippers during fruiting stage．The tomato yield by Netafim drippers was also ranked the highest，with 9.3%，11.9%，14.3% higher than the treatment of Trace irrigation system，Beijinglvyuan and Baodinghuayu，respectively．The water consumption by Netafim drippers in the whole tomato growth stage was ranked the highest，with 4.0，8.3，4.9 mm increase than the treatment of Trace irrigation system，Beijinglvyuan and Baodinghuayu，respectively．Collecting all factors，Netafim drippers was suitable for use in planting tomato in solar greenhouse under gravity drip irrigation．
2011 Vol. 1 (22/24): 96-99 [
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1084
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100
Analysis of Yield Increase and Water-saving Effect in Film-mulched Irrigation on Greenhouse Tomato
JIA Song-tao1，ZHU Qing-yan1，GAO Jing1，SUN Bao-xiang1，WEI Jian-wen1，BAI Yi2
Impact of furrow irrigation above mulch and under mulch on‘Dongsheng No.1’tomato’s growth，yield and water use efficiency were studied with conventional furrow irrigation as the control．The results showed that soil water content was maintained with certain scopes，more readily with furrow irrigation above mulch．Tomato growth was more preferable with furrow irrigation under mulch，and less prone to senescence．Yield of furrow irrigation under mulch was increased significantly by 11.34% than the conventional furrow irrigation．By the contrast，with conventional furrow irrigation，water consumption of furrow irrigation above mulch and under mulch were 31.33% and 27.00% less，respectively and water use efficiency were increased by over 50%．
2011 Vol. 1 (22/24): 100-103 [
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1067
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104
Effects of Nitrogen Application Quantity on Greenhouse Color Pepper Production and Soil Nitrate Content
GUAN Li-ru1，ZHANG Cheng-jun2 ，LIU Jia-wei 1，ZHU Xin-yu1，LI Zhi-feng1，ZHAO Jing1，LIU Juan1，WANG Li1
The effects of 5 nitrogen levels on soil nitrate contents，color pepper（Capsicum annuum L.）production and economic benefits were studied under the greenhouse cultivation conditions with integration of water and fertilizer．The results showed that the soil nitrate contents in soil layer 0-20 cm were higher than that of soil layer 20-100 cm for different nitrogen levels．Along with the increasing amount of applied nitrogen fertilizer，soil nitrate contents of different soil layers and soil nitrate accumulation at 0-100 cm depth showed significantly increased trend．Under 0.225 t hm-1 N levels（medium N），the greenhouse pepper production，its economic benefit and unit nitrogen increased were the highest．
2011 Vol. 1 (22/24): 104-107 [
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1175
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108
Experiment of Injection Control System of Water and Fertilizer Uniformity Drip Irrigation for Greenhouse Vegetable
WANG Xiu，MA Wei，ZHANG Rui，ZOU Wei，ZHOU Zhou
Sampling single drip irrigation tube at different times and using fertilizer injection drip irrigation in greenhouse，we studied the spatial and temporal variation of irrigation flow and fertilizer concentration in the irrigation process by Rhodamine WT（0.1 g L-1）solution as fluorescent tracer．According to the changes of irrigation flow and fertilize concentration and the hydraulic characteristics in different conditions of fertilization injection，the affection to water and fertilizer uniformity were studied by the fertilization injection drip irrigation system，and liquid fertilizer distribution in the pipeline system were analyzed in the fertilization injection process finally．The results showed that the drip irrigation and injection fertilizer control system can realize the accurate control of fertilizer rate by controlling water suppy quantity and injection rate of mixed solution.
2011 Vol. 1 (22/24): 108-111 [
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1079
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112
Testing of Vegetable Spraying Expert System with High Efficiency Equipment
MA Wei1，WANG Xiu1 ，SHEN Han2，ZHAI Chang-yuan1，3，QIN Gui2，ZHANG Rui1
In order to meet the requirement for high efficient，accurate and convenient spraying，we stored the experts’experience and knowledge in SCM by the aid of information technology，and through quick and efficient selection，reached the objective of high efficient spraying on vegetables．This paper introduces the working principles of the expert system and validates the uniformity of theoretical application quantity with the actual control value through experiments.
2011 Vol. 1 (22/24): 112-114 [
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849
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115
Comparison on Performances of Electric Mist-blower 3WDC-8 and Traditional Knapsack Sprayer
GONG Shao-jun，ZHANG Jia-yong，YAN Zi-shuang
In order to explore the new machines which can be used to control all pests，insects and diseases of greenhouse vegetables，the comparative experiments between electric mist-blower 3WDC-8 and conventional knapsack sprayer WS-16 were carried out in this paper．The result indicated that the electric mist-blower 3WDC-8 had advantages in pesticide deposition，high efficiency and water saving．It is suitable to be used in solar greenhouse and big-arch shelter for plant protection in outskirts of Beijing.
2011 Vol. 1 (22/24): 115-117 [
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1083
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690
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118
Effects and Economic Benefit Analysis of Control Cucumber Root-knot Nematodes by Different Fumigant Treatments
CAO Ao-cheng1，2，GUO Mei-xia1，2，YAN Dong-dong1，MAO Lian-gang1，ZHAO Hai-bin1，XIE Hong-wei1，LI Wei1，WANG Qiu-xia1，2，LI Yuan1，2，ZHENG Jian-qiu2，3，WU Zhen-mei4
Several fumigants，93% 1，3-dichloropropene EC，62% 1，3-dichloropropene capsule，42% metham sodium AS，98% dazomet MG，99% sulfuryl fluoride TC，93% 1，3-D EC+98% dazomet MG，and 93% 1，3-D EC+42% metham sodium AS，were used to control cucumber root-knot nematodes．98% Methyl bromide was used as control．The results showed that all fumigant treatments had good efficacy against root-knot nematodes．The cucumber yield from all fumigant treatments was higher than that of untreated control．The yield obtained by treatments of 50 g m-2 98% Methyl bromide，9 g m-2 93% 1，3-D EC+25 g m-2 98% dazomet MG and 9 g m-2 93% 1，3-D EC+21 g m-2 42% methm sodium AS were the higher than the control．Good yield and economic benefits can also be achieved，when cucumber is treated with fumigants 9～18 g m-2 1，3-D EC，1，3-D capsule and 25～50 g m-2 sulfuryl fluoride TC.
2011 Vol. 1 (22/24): 118-121 [
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122
Identification of Tomato Wilt Pathogen in Pinggu District of Beijing
LI Yuan，ZHANG Da-yan，XU Wen-yuan，GUO Mei-xia，CAO Ao-cheng
The research work described in this paper was mainly about the segregation，purification and identification of tomato（Lycopersicum esculentum Mill.）wilt pathogen in the susceptible plant collected from Pinggu district in Beijing．The results of morphological observation and molecular biological techniques identification showed that Fusarium oxysporum was the main causing agent for tomato wilt．Besides，Fusarium proliferatum may be the complex infected agent.
2011 Vol. 1 (22/24): 122-124 [
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1209
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535
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125
2011 Vol. 1 (22/24): 125-129 [
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2011 Vol. 1 (22/24): 130-132 [
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133
2011 Vol. 1 (22/24): 133-135 [
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136
2011 Vol. 1 (22/24): 136-138 [
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584
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2011 Vol. 1 (22/24): 139-143 [
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144
2011 Vol. 1 (22/24): 144-144 [
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China Vegetables
Address: the haidian district of Beijing zhongguancun south street, number 12 zip
code：100081 Tel：010-82109550 E-mail:zgsc@mail.caas.net.cn
