关键词: 食虫沟瘤蛛, 白背飞虱, 荧光物示踪, 摄食量, 重复施药

Abstract: By applying a patented technique, the quantitative analysis of food intake using the fluorescence tracer as it is transferred in the food chain, we studied the food intake of Ummeliata insecticeps (Bosenberg et Strand) when exposed to pesticide buprofezin repeatedly. The results showed that food intakes of the surviving spiders in all treated groups were much less than that in the control group. Food intake of surviving U. insecticeps sprayed with buprofezin for the first time was less than that of the surviving spiders sprayed with the pesticide for the second or third time when buprofezin was diluted. It took a long time for the surviving spiders to recover when sprayed with the pesticide at high concentrations. Since the applying pesticides could bring high mortality to the spider, food intake of U. insecticeps population greatly decreased in 13 days after being sprayed with buprofezin. Though the surviving spiders in the treated groups ate even more than the control individuals on the 13th day, no pesticide was worth spraying because food intake of the population in the treated groups was less than that in the control group due to the high mortality of the population.

Key words: Ummeliata insecticeps, Sogatella furcifera, fluorescence labeling method, food intake, repeated pesticide exposure