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| Control Effect of Five Biological Pesticides Against Asparagus Stem Blight |
| YANG Shuai1，XU Shubing1，JIN Yan2，ZHANG Guofu2，FENG Yongxin3，WANG Hongyan1* |
1College of Plant Protection，Shandong Agricultural University，Tai’an 271018，Shandong，China；2Shandong Provincial
Pesticide Detection Institute，Jinan 250100，Shandong，China；3China Tobacco Hebei Industrial Limited Company，
Shijiazhuang 050051，Hebei，China |
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Abstract The bacteriostatic activity of 5 biological pesticides including Bacillus subtilis，lentinan，
kasugamycin，polyoxin and amino-oligosaccharin against asparagus stem blight pathogen，plant safety
and field control effect on these diseases were determined by growth rate method and stem leaf spray
method．The results of growth rate test showed that lentinan and amino-oligosaccharin had no direct antibacterial
activity against Phomopsis asparagi．The safety test showed that 1 200-2 400 t · hm-2 the Bacillus subtilis WP
could inhibit the growth of asparagus．The results of two-year efficacy test showed that 7 days after the last
application，the differences between the average control effect of high-dose of 5 biological pesticides and the
contrast medicament difenoconazole were not significant．And they all showed better control effect on asparagus
stem blight．Fourteen days after treatment，the field control effects of Bacillus subtilis WP，2% lentinan AS and 5%
amino-oligosaccharides AS were all significantly higher than those of the contrast．The 5 biological pesticides
could all be used for green prevention and control of asparagus stem blight，among them lentinan and aminooligosaccharides
belong to plant inducers，had good control effect and longer effective duration．
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Received: 06 August 2020
Published: 19 November 2020
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