作 者：
蒲蛰龙;古德祥;周汉辉;汤鉴球;张润杰;张宣达
摘 要：
大沙区位于北纬23°19′,东经112°40′,处于广东的西、北、绥三江下游围田地区。年平均温度21.3℃,常年降雨量1,800毫米。全区水稻面积6万亩,旱地8,000多亩,稻谷是主要粮食作物。历史上,这一带受三条江河的泛滥淹涝,耕作制度复杂,既有水浸低洼田,又有高旱田;既有单季稻,又有双季稻。因此,害虫可以终年转主为害,是三化螟(Scirpophaga incertulas)、稻纵卷叶螟(Cnaphalocrocis medinalis)、褐飞虱(Nilaparvata lugens)和粘虫(Lencania separata)的严重发生地区,病虫害的
译 名：
INTEGRATED CONTROL OF RICE PEST INSECTS IN DASHA TOWNSHIP,SIHUI COUNTY, GUANGDONG PROVINCE
作 者：
Pu Zhelong Gu Dexiang Zhou Hanhui Tang Jiangqiu Zhang Runjie Zhang Xuada (Research Institute of Entomology, Zhongshan University, Guangzhou, Guangdong Province)
摘 要：
The IMP programme of major rice pest insects, namely white rice stem borer (Scirpophaga incertulas), brown rice planthopper (Nilaparvata lugens), rice leafroller (Cnapkalocrocis medinalis) and army worm (Leucania separata) , was conducted in Dasha township (formerly Dasha Commune) .Areas of experiment were extended from 24.17 mu (1.6 ha) in 1973 to about 60,000mu (4,000 ha) of the total rice fields in the whole township in 1975. Up to 1983 the experiments were continued for 11 years.In the first stage (1973—1978) of the experiments, the principal techniques used in the IPM programme were: (1) Cultural control practices such as levelling rice fields,improving irrigation condition,ploughing the paddy field in early spring followed by immersion of water to suffocate the over-wintering larvae of white rice stem borers in rice stubbles, applying resistant varieties against insect pests or diseases. (2) Biological control processes such as rearing ducks for controlling pest insects, applying preparations of Bacillus thuringiensis to control several species of lepidopterous rice insects, chiefly rice leafrollers, releasing parasitoids, Trichogramma spp., to control eggs of rice leafrollers. (3) Pesticide spraying was generally carried out only as spot treatments in heavily infested areas, and to create a favorable condition in which it would be favourable to the increase in number of nutural enemy's populations in large areas of the whole paddy field.In the second stage (1979—1983), some biological control measures mentioned above were not used. However, conservation and protection of the natural enemies to control pest insects, insistence On agricultural control practices and rational application of chemical insecticides were persisted in.During the course of the IPM programme in Dasha, the rate of the white head of paddy caused by the white rice stem borers was recorded as under 0.5% on the average, over 98% rice plants were found practically without damage caused by the brown rice planthopper, and the infestation of rice leafrollers significantly decreased so that the areas needed to be controlled were only about 3-10% of the whole paddy field. Damage caused by army worm practically disappeared. The quantity of chemical insecticides used decreased by 49—82% and the environmental pollution was lighter.In the course of the experiments, species of natural enemies and pests have been investigated. Near 50 species of predators, about 50 species of parastoids and 38 species of insect pests of which 6 species were major pests were recorded. Their population fluctuation in paddy fields was studied and it was revealed that the correlation between spiders and pest insects was significant. The relationship of predatorprey has been further verified by serological method. The population dynamics of rice leafroller have been studied. Based on data of life tables, it was attempted to simulate the population dynamics with computer in order to forecast the occurrence of this insect.
