Bioactivity of Indigenous Melia azedarach Extracts against the Tomato Leafminer,Tuta absoluta  

作　　者：Efat Abou-Fakhr Hammad Amani Abbass Muhammad Abbass Zaynab Mohamad Haidar Josiane El-Chemali Youssef Abou Jawdeh Ludmilla Ibrahim 

机构地区：[1]Department of Plant Protection,Faculty of Agricultural&Veterinary Sciences,Lebanese University,Dekwaneh,Beirut,Lebanon [2]Ministry of Agriculture,Department of Agriculture Extension Services,Bire Hasan,Beirut,Lebanon [3]Exotica,Department of Ornamental Plants Production,Zouk Mosbeh,Beirut,Lebanon [4]Department of Agriculture,Faculty of Agricultural&Food Sciences,American University of Beirut,Bliss Street,P.O.Box 11-0236,Riad El-Solh 1107-2020,Beirut,Lebanon [5]Department of Crop Production,Faculty of Agricultural&Veterinary Sciences,Lebanese University,Dekwaneh,Beirut,Lebanon

出　　处：《Journal of Agricultural Science and Technology(A)》2019年第1期8-25,共18页农业科学与技术（A）

摘　　要：Fruit extracts of indigenous Melia azedarach were tested for their insecticidal bioactivity against the tomato leafminer(Tuta absoluta)under laboratory conditions.Tomato plants were exposed to moths,after/before application of treatments.Treatments included:crushed fruit extracts of water(500,000 ppm and 200,000 ppm),methanol and ethyl acetate(200,000 ppm)with and without mineral oil(2%);M.azedarach powder extracts(2,000 ppm)in different solvents:water,methanol,ethanol,ethyl acetate,hexane and chloroform;biorational products:neem oil,mineral oil,micronized sulfur and thyme oil.The released moths were removed from treated/untreated plants at 72 h and effect of treatments on adults,eggs,larvae and pupae were recorded.Results indicated that sulfur caused the lowest number of live moths to be present on treated plants and was not significantly different in its effect from that of M.azedarach extracts and neem oil.Aqueous extracts without and with oil caused the highest%of dry eggs and were comparable to neem oil.Extracts in the two formulations(crushed fruits and/or powder)caused significant direct effects on immature instars:eggs,early larval instars and pupae.M.azedarach extracts and the tested products also caused indirect effect in form of significant decrease in number of developing the 3rd larval instars and new emerging moths compared to the control.Consecutive sprays of these extracts against eggs,larvae and pupae on same treated plants lead to very low number of moths for a second generation of the pest which contributes to low buildup of pest population in a tomato crop.

关 键 词：Tuta LEAFMINER TOMATO Melia plant EXTRACT indigenous SPECIES 

分 类 号：S[农业科学]