ความเป็นพิษของสารสกัดจากเมล็ดสะเดาไทย Azadirachta indica var. siamensis Valeton ต่อหนอนผีเสื้อกินไขผึ้งขนาดใหญ่ Galleria mellonella Linn. และหนอนผีเสื้อกินไขผึ้งขนาดเล็ก Achroia grisella Fabr. / ประนอม ปัญจพัฒนศิริ = Toxicity of the neem azadirachta indica var. siamensis valeton seed extract on the greater wax moth larvae galleria mellonella linn. and the lesser wax moth larvae achroia grisella fabr. / Pranom Panchaphattanasiri
Toxicity of neem seed extract on the greater wax moth larvae Galleria meellonella Linn. And the lesser wax moth larvae Achroia grisella Fabr. Was investigated by using topical application and feeding method. The LC50 values with P = 0.05 were evaluated and analysed by probit program. When using topical application in G. mellonella and A. grisella, neem seed crude extract was not contact poison, the results showed that at high concentration, the mortality of larvae was low. By feeding method, the LC50 (240 hours) of neem seed crude extract were 4.14, 3.32 and 10.48%, for commercial neem seed extract (Neemix) were 4.68, 3.97 and 15.03 % for the 3rd, 4th and 5th instars respectively. The respective values for A. grisella were 3.20, 2.47, 8.13 and 4.72, 3.99, 12.71 %. Toxicity of neem seed crude extract and Neemix were insignificant (p ≤ 0.05).