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二化螟为稻区主要害虫,其枯心率与含虫量是检验螟害程度、防治质量、以及预测预报的重要依据。按常规方法检查枯心率和虫口密度,需逐丛逐株观察和剥查,工作量极大。为简化调查方法,提高工作效率,现将1975年以来调查的有关资料,经过枯心丛率与其枯心株率、枯心株率与其含虫量的相关回归分析,由枯心丛率推算其枯心株率,再由枯心株率推算其含虫量。经过大田试用,效果较好。 一、枯心丛率与枯心株率的关系 经10丘稻田(每丘0.5分,5,308丛枯心丛率与枯心株率的全群查算,测得枯心丛率
Chilo suppressalis is the main pest in rice area. The withered rate and the amount of larvae are the important basis to test the degree of pest damage, quality of control and forecast. According to the conventional method of checking the heart rate and insect population density, the need to observe by cluster plexus and stripping, heavy workload. In order to simplify the survey method and improve work efficiency, the relevant data of the survey since 1975 are analyzed by regression analysis between the rate of withered plexus and the rate of withered plant, Withered strain rate, and then calculated by the rate of dry heart rate of insect. After field trial, the effect is better. First, the relationship between the rate of withered clumps and the rate of dead clumps 10 clump rice fields (0.5 m per hill, 5,308 plexus plexus clumps and heart rate of the whole group calculation, the measured clump plexus rate