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| Immature Development of Pieris rapae（Lepidoptera：Pieridae）on Cabbage Plants after Infested by B Biotype Bemisia tabaci（Hemiptera：Aleyrodidae） |
| MI Hong-bin1，2，SHAN Hong-wei2，ZHANG Shi-ze2，3*，ZHANG Fan4，LIU Tong-xian2，3 |
| 1Certification Center of Northwest A & F University，Yangling 712100，Shaanxi，China|2College of Plant Protection，Northwest A & F University，Yangling 712100，Shaanxi，China|3State Key Laboratory of Crop Stress Biology for Arid Areas，Yangling 712100，Shaanxi，China|4Institute of Plant and Environmental Protection，Beijing Academy of Agricultural and Forestry Sciences，Beijing 100097，China |
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Abstract To determine whether B biotype Bemisia tabaci（Gennadius）（Hemiptera：Aleyrodidae）feeding could induce plant defense against Pieris rapae Linnaeus（Lepidoptera：Pieridae），we carried out the effects of B. tabaci on biological parameters of P. rapae on cabbage（Brassica oleracea var. capitata L.），including larva growth and development，body weight and length，under greenhouse condition（16.0-46.2 ℃，natural light）．The results indicated that mean durations of 1st instar and pupal stage were not significantly different when fed on whitefly infestation cabbage plants compared with the contrast，while the mean durations of P. rapae from 2nd to 5th instar were 36.0%，40.0%，57.9% and 24.3%，respectively longer than the contrast．The total larva duration prolonged 31.0%．There was no difference in pupal period．The body weights of P. rapae from 2nd to 4th instar were 25.8%，34.0% and 31.9%，respectively lower than the contrast．However，there were no differences in weights of 1st and 5th instar larval and pupal．The body lengths of of P. rapae from 1st to 4th instar were 11.1%，11.5%，8.8% and 11.9%，respectively shorter than the contrst．These results showed that B. tabaci infestations had negative effect on the early stage development of P. rapae.
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Received: 21 November 2011
Published: 21 February 2012
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