我国主要储粮害虫抗性调查研究

通过对全国范围内23个省、市和自治区的55个地区粮库中的主要储粮害虫进行取样，用FAO抗性测定方法对92个虫样进行磷化氢抗性测定，得出无抗性虫样占调查虫样总数的54．3％、低抗性虫样占9．8％、中等抗性虫样占7．6％、高抗性虫样占13．0％、极高抗性虫样占15．2％。在调查的几种主要储粮害虫中，高抗性虫样主要为锈赤扁谷盗、谷蠹和米象，其中锈赤扁谷盗的抗性普遍比较严重，谷蠹和米象通过与1995年抗性调查所取的样品进行比较，在最近的8年内米象的抗性倍数增加了10．7％、谷蠹增加了71．2％。磷化氢抗性较高的区域主要是我国西南、华中和华南地区。

INVESTIGATION OF PHOSPHINE- RESISTANCE IN MAJOR STORED GRAIN INSECTS IN CHINA

Phosphine-resistance in 92 strains of major stored grain insects collected from 55 grain reserves in 23 provinces or municipalities of the country were detected through the method recommended by FAO.The result showed that the susceptible strains,slight-resistant strains,middle-resistant strains,high-resistant strains and super-resistant strains accounted for 54.3%,9.8%,7.6%,13.0%,15.2% of the total strains respectively.The dominating high-resistance species of insects investigated were Cryptolestes Ferrugineus,Rhizopertha dominica and Sitophilus Oryzae. Among them,resistance in Cryptolestes Ferrugineus was more serious generally,and in Rhizopertha dominica and Sitophilus Oryzae increased 71.2% and 10.7% respectively within the latest 8 years,according to comparison to the investigation in 1995.Southwest,middle and south areas of China were the major zones investigation areas in 1995.Southwest,middle and south areas of China were the areas zones where resistance to phosphine in stored grain insects developed relatively significant.