高良姜根莖粉劑對煙草甲的毒殺作用
Contact Toxicity of Plant Powder Formulation of Alpinia officinarum Hance Rhizome against Lasioderma serricorne (Fabricius)
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摘要: 為明確高良姜根莖粉劑對儲煙害蟲煙草甲的毒殺作用,，采用藥膜法測定了5種不同濃度下高良姜根莖粉劑對煙草甲卵,、幼蟲、蛹,、成蟲4種蟲態(tài)的毒力作用,。結(jié)果表明,，高良姜根莖粉劑對煙草甲成蟲具有一定的觸殺作用,，并且隨著處理濃度增大、處理時間的延長而增強,，但對其幼蟲無觸殺作用,。在處理濃度范圍內(nèi)，在16 g/ m2的處理濃度下對煙草甲成蟲的校正死亡率最高可達45％以上,。高良姜根莖粉劑對煙草甲卵和蛹也都有較強的觸殺作用,，最高校正死亡率均達到60％以上。因此,，高良姜根莖粉劑是一種具有較大應用潛力的植物源殺蟲劑,。Abstract: Aiming to determine toxic bioactivity of plant powder formulation of Alpinia officinarum Hance Rhizome against Lasioderma serricorne (Fabricius), an important stored tobacco pest insect, the contact toxicity of plant powder formulation of A. officinarum Hance Rhizome against L. serricorne eggs, larvae, pupae and adults was tested at 5 concentration levels in laboratory using pesticide-film method. The results showed that the powder formulation of A. officinarum Rhizome performed strong contact toxicity against L. serricorne adults, which gradually enhanced with increasing treatment concentration or/and extending treatment time, and no contact toxicity against L. serricorne larvae at 28±1 ℃, 75±5% RH.. Within the treatment concentration range, the highest corrected mortality for adults reaching over 45% at 16 g/m2. The powder formulation of A. officinarum Rhizome also exhibited strong contact toxicity against L. serricorne (Fabricius) eggs and pupae, with the highest corrected mortality for eggs and pupae reaching over 60％ at 16 g/m2. Therefore, plant powder formulation of A. officinarum Hance Rhizome is a promising plant-based insecticide to control L. serricorne.
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