The Comprehensive Evaluation On Control Efficacy Of Insecticides To Sitobion Avenae

At present in our country, the application of insecticides still plays an important part in agriculture, and can not be neglected, but while killing the target insects, the insecticides bring much negative influence to the health of mankind, the biodiversity and ecosystem balance, etc. It, so that, is not comprehensive that the insecticides evaluation is merely on the basis of control efficacy against an insect. In this paper, the author uses the evaluation method of multiple objectives, suggesting the application of AHP model to insecticides evaluation. Moreover, the author applys the method to evaluation of different insecticides to Sitobion avenae. Main results are as follows:1. On the basis of the systematical view, this paper suggests the application of the analytical hierarchy process (AHP), to construct an evaluation system for four aspects, control efficacy, control cost, resistance and ecological effect, including eight factors:target pest control efficacy, non-target pest control efficacy, control cost, resistance risk,safety to mankind and livestock, residue risk, resurgence risk and damage to natural enemy. Making use of the AHP model, the factors weight respectively are 0.4294, 0.0716, 0.2471,0.0941, 0.0914, 0.0331, 0.0191 and 0.0142.The author poses the quantification and undimentionalization methods of different index layers. According to the comprehensive evaluation value, we get the comprehensive efficacy of different insecticides to guide the agricultural production.2. According to the evaluation method, the author takes a comprehensive evaluation on the usual insecticides: Imidacloprid, Decamethrin, Cyhalothrin, Pirimicarb and Chlorpyrifos,on the basis of field trial and indoor experiments. The comprehensive evaluation values of the insecticides respectively are 2.4836, 1.4358, 1.6646, 2.1966 and 1.2042. The paper shows that, to control Sitobion avenae, 10% Imidacloprid WP2000x is the best.