苦楝果提取物对桑天牛产卵量及卵孵化率的影响

Effects of Extracts of Melia azedarach Fruits on Oviposition and Egg Hatch in Apriona germari (Coleoptera,Cerambacidae)

以用一定浓度的苦楝果提取物处理的构树枝条作为天牛的食物 ,研究了其对桑天牛产卵及卵孵化的影响。在室温下用苦楝果提取物 5 0 0mg/kg处理枝条 ,处理组天牛 ( 7对 )在1 5天试验中 ,7对天牛日平均产卵量为 8.5 3± 2 .35个 ,而对照组 7对天牛日平均产卵量为1 5 .80± 0 .98个。经T检验处理组与对照组之间差异极显著。用 2 5 0、1 0 0 0、2 0 0 0mg/kg的苦楝果提取物处理枝条 ,在 1 5天试验中 ,7对天牛日平均产卵量分别为 8.0 6± 2 .90、6.73± 3.82、5 .2 0± 1 .74个 ,而对照组 7对天牛的日平均产卵量为 1 3.73± 2 .90个。经T检验它们与对照之间差异极显著。取食含苦楝果提取物 2 5 0、1 0 0 0、2 0 0 0mg/kg处理枝条后 ,天牛产的卵分别需经 1 2、1 5、1 9d达到其最终孵化率 94.2 1 %、87.1 2 %、43.5 8% ;而对照组 1 1d达到最终孵化率 99.5 0 %。

Branches of Broussonetia papyrifera L.were treated with Melia azedarach Linn.fluextracts as the food of the beetle( Apriona germari Hope),the effects of the extracts on their oviposition and egg hatch were studied.During 15 days' testing period the average egg number laid per day of seven pair of the beetles in treated group,which were fed on branches treated by 500 mg/kg of the extracts was 8.53±2.35 and that in the control group(7 pairs)was 15.80±0.98.T test shown significant different between the values of treated and control groups.In the test with 250?1 000? 2 000 mg/kg of the extracts,their average egg number laid per day of the seven pairs of the beetles was 8.06±2.90?6.73±3.82?5.20±1.74 and that for the control group was 13.73±2.90.T test shown the difference between the two values were significant.The hatching rate of the eggs laid by the beetles,which had fed on the branches treated with 250?1 000?2 000 mg/kg of the extracts,reached their final hatching rates, 94.21% ?87.12%?43.58% at 12 th ?15 th ?19 th day.However,that of eggs laid by control beetles was 99.50% at 11 th day.Based on the above results,perspective of utilization of Melia azedarach extracts to control the beetle was discussed.