[ Objective] The paper aimed to study the biological property of predatory enemy of Harpalus griseus （panzer） against pasture pests. [ Method] H. griseus was collected to carry out biological feeding trial during la...[ Objective] The paper aimed to study the biological property of predatory enemy of Harpalus griseus （panzer） against pasture pests. [ Method] H. griseus was collected to carry out biological feeding trial during late April to late October in 2008, predatory behavior was observed and the poisoning effect of pesticides on H. griseus was tested. [ Result] H. gdseus occurred generation in one year in Guizhou and overwintered in the soil in the form of adult. Adult was the main form to prey the quarry. One individual adult of H. griseus could mostly prey armyworm for 6.36 heads within 24 h, pesticides had obvious poison effect on H. gdseus in the former 10 d, while it mainly had repellent effect in the latter period. [ Conclusion] This study could provide theoretical foundation for protecting H. griseus and controlling pasture pests.展开更多
Laboratory feeding experiments with the poplar aphid, Chaitophorus populeti （Panzer）, feeding on transgenic poplar （P. alba × P. glandulosa） varieties C13-5 and C013-5, were carried out to study the effect of...Laboratory feeding experiments with the poplar aphid, Chaitophorus populeti （Panzer）, feeding on transgenic poplar （P. alba × P. glandulosa） varieties C13-5 and C013-5, were carried out to study the effect of transgenic poplar on the ladybird Harmonia axyridis （Pallas）. The mortality and development time of the immature stages, the eclosion rate and body mass of H. axyridis were measured. The results indicated that C. populeti feeding on different varieties of transgenic plants had no statistically significant ef- fect on the mortality ofH. axyridis larvae. The development time of larval and pupal stages were not significantly different between the two transgenic poplars and a non-transgenic poplar. Furthermore, the body mass and eclosion rate did not show any difference between the H. axyridis feeding on aphids reared on transgenic plants and those from non-transgenic plants. It is suggested that transgenic plants have no deleterious effect on the predatory ladybird.展开更多
基金Supported by Science and Technology Department of Guizhou Province(LKS[2009]No.2085)Southwest Guizhou Technology project(Agriculture2009-20)~~
文摘[ Objective] The paper aimed to study the biological property of predatory enemy of Harpalus griseus （panzer） against pasture pests. [ Method] H. griseus was collected to carry out biological feeding trial during late April to late October in 2008, predatory behavior was observed and the poisoning effect of pesticides on H. griseus was tested. [ Result] H. gdseus occurred generation in one year in Guizhou and overwintered in the soil in the form of adult. Adult was the main form to prey the quarry. One individual adult of H. griseus could mostly prey armyworm for 6.36 heads within 24 h, pesticides had obvious poison effect on H. gdseus in the former 10 d, while it mainly had repellent effect in the latter period. [ Conclusion] This study could provide theoretical foundation for protecting H. griseus and controlling pasture pests.
基金supported by the National Premier Special Funds for Study and Industrialization of Transgenic Plants (J2002-B-004)the National Natural Science and Technology Support Plan of China "the technology researchdemonstration of forestry-paper integrate project" (Grant No. 2006BAD32B)
文摘Laboratory feeding experiments with the poplar aphid, Chaitophorus populeti （Panzer）, feeding on transgenic poplar （P. alba × P. glandulosa） varieties C13-5 and C013-5, were carried out to study the effect of transgenic poplar on the ladybird Harmonia axyridis （Pallas）. The mortality and development time of the immature stages, the eclosion rate and body mass of H. axyridis were measured. The results indicated that C. populeti feeding on different varieties of transgenic plants had no statistically significant ef- fect on the mortality ofH. axyridis larvae. The development time of larval and pupal stages were not significantly different between the two transgenic poplars and a non-transgenic poplar. Furthermore, the body mass and eclosion rate did not show any difference between the H. axyridis feeding on aphids reared on transgenic plants and those from non-transgenic plants. It is suggested that transgenic plants have no deleterious effect on the predatory ladybird.
