福建地区储粮害虫防治经济阈值调研与分析

SURVEY AND ANALYSIS OF ECONOMIC THRESHOLDS FOR STORED INSECT PEST CONTROL I NFUJIAN AREA OF CHINA

通过对福建7个储备粮承储企业159个仓廒89.17万吨库存粮食害虫防治经济性调研与分析,分别研究了害虫蛀食性和粉食性、小麦和玉米、熏蒸杀虫温度等情况下储粮害虫防治与其经济阈值的初步关系。主要结果包括:①蛀食性害虫的经济阈值小于粉食性害虫,同等条件下处理蛀食性害虫挽回的经济损失要大于付出的成本;②小麦和玉米品种的经济阈值小于稻谷,在同样的条件下,出现同样的害虫,处理小麦和玉米所付出的代价比挽回的经济损失要小;③熏蒸杀虫时,粮温在20℃以上,经济阈值较小,当粮温在15℃以下及35℃以上时,害虫防治的经济阈值较大。

According to flour beetles and boring beetles, grain type, and fumigation temperatures, and so on, the basic relationship between stored grain insects control and economic thresholds were investigated by analyzing benefit and cost of the control practices in seven depots of State Grain Reserves （159 warehouses holding 891,700 t of grain） in Fujian Province. Main conclusions could be drawn as follows： （1） the economic threshold for boring beetles in stored grain was lower than that for flour beetles, and the retrievable economic loss was more than cost for eontrol!ng boring beetles at the same condition. （2） the economic threshold for wheat and maize was lower than that for paddy rice, and treatment cost for controlling the same insects in wheat and maize was less than the trievable economic loss at the same condition. （3） the economic threshold was lower when the grain temperature above 20℃, and higher when the grain tempera ture was below 15℃ or above 35℃ during fumigation.