韭菜迟眼蕈蚊防治阈值研究

对田间调查的韭菜迟眼蕈蚊幼虫虫口密度和韭菜产量损失的关系进行回归分析,确定了虫口密度与产量损失呈正相关(r=0.816);依据近年韭菜迟眼蕈蚊幼虫防治试验数据和防治成本和韭菜产品在市场销售价格高、中、低情况,统计出虫害产量损失系数和经济阈值;并从提高防治经济效益、生态效益、社会效益的角度出发,确定了防治指标。同时,通过对投入产出比、虫口密度、防治成本、价格、防治效果的回归分析,确定防治指标的预测模式。

Studies on the Control Threshold of Braidysia olaiphage in Chinese Chive Field

The regression analysis on field investigation data of the relationship between Braidysia olaiphage larva density and the yield of Chinese chive was done and a positive correlation(r=0.816)between the larva density and the Chinese chive yield loss was found.Based on the recent year Braidysia olaiphage larva field control experiment data,the cost of the pest control and the marketing price of Chinese chive,the yield loss coefficient and the critical economic value were calculated,and the pest control index was determined in the point of view to improve the benefit of economy,ecology and sociology.In addition,a forecast mode to determine the control index was proposed based on the regression analysis of input/output ratio,larva density,control cost,price and control effect.