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Effect of host plants on the infectivity of nucleopolyhedrovirus to Spodoptera exigua larvae

文献类型： 外文期刊

作者： Wan, N. -F. 1 ; Jiang, J. -X. 2 ; Li, B. 1 ;

作者机构： 1.Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Inst Biodivers Sci, Shanghai, Peoples R China

2.Shanghai Acad Agr Sci, Shanghai Key Lab Protected Hort Technol, Ecoenvironm Protect Res Inst, Shanghai, Peoples R China

关键词： beet armyworm;host plant;infectivity;nucleopolyhedrovirus;Spodoptera exigua;tritrophic interactions

期刊名称：JOURNAL OF APPLIED ENTOMOLOGY （ 影响因子：2.603； 五年影响因子：2.562 ）

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收录情况： SCI

摘要： Previous studies have shown that the infectivity of baculovirus to herbivores is affected by phytochemicals ingested during the acquisition of viral inoculum on the foliage of host plants. Here, we measured the effects of 14 host plant species on the infectivity of Spodoptera exigua nucleopolyhedrovirus (SeNPV) to its larvae. The order of the LD50 values of SeNPV among the host plants was Ipomoea aquatica>Brassica oleracea>Raphanus sativus>Amaranthus tricolor>Spinacia oleracea>Vigna unguiculata> Solanum melongena>Capsicum annuum>Apium graveolens>Allium fistulosum>Lactuca sativa>Brassica chinensis>Zea mays>Glycine max, with 940.1 +/- 2.26, 424.0 +/- 0.60, 295.2 +/- 1.13, 147.3 +/- 0.63, 138.6 +/- 0.22, 119.9 +/- 0.07, 119.8 +/- 0.02, 109.2 +/- 0.18, 104.8 +/- 0.62, 102.1 +/- 0.66, 97.9 +/- 0.22, 89.9 +/- 0.32, 79.0 +/- 0.13 and 64.0 +/- 0.38 OBs per larva, respectively, and the values of mean time to death of virus-infected larvae were 6.21 +/- 0.11, 7.12 +/- 0.10, 7.33 +/- 0.21, 6.97 +/- 0.02, 7.06 +/- 0.01, 7.29 +/- 0.03, 7.32 +/- 0.05, 7.07 +/- 0.08, 7.24 +/- 0.11, 7.09 +/- 0.13, 7.50 +/- 0.06, 7.23 +/- 0.01, 7.30 +/- 0.02 and 7.19 +/- 0.07days, respectively. The mean time to death of larvae decreased with increasing viral dose, and corrected mortality decreased as the larval mean time to death increased. These findings have significance for understanding the effects of host plants on the infectivity of baculovirus to noctuids.

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