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江西省自1979年以来,对农业昆虫天敌种类分布进行了调查,并对优势种的利用开展了研究,现将稻螟赤眼蜂的观察结果报道于下: 稻螟赤眼蜂Trichogramma japonicum Ashmead,分布广,数量多,寄生率高,是自然控制二化螟种群数量消长的主要优势种。据弋阳县调查,该蜂在施用农药较少的稻区,对螟卵的寄生率高达100％,低的为7.14％,平均为53.80％,卵粒寄生率最高达94.44％,低的O.99％,平均为28.10％。在丰城荣塘,曾用人工繁殖稻螟赤眼蜂56万头,于第一、二代二
Since 1979, the species distribution of agricultural insects in Jiangxi Province has been investigated and the utilization of dominant species has been investigated. The observations of Trichogramma ostrich were reported below: Trichogramma japonicum Ashmead, Widely distributed, the number of large, high parasitism, is the natural control of the population of rice stem borer the main dominant species. According to Yiyang County survey, the bee in the application of pesticides less rice area, the parasitic rate of borer eggs as high as 100%, 7.14% low, with an average of 53.80%, the highest parasitic egg rate of 94.44%, low O .99%, an average of 28.10%. In Fengcheng Rongtang, there were 560,000 red-eye beetles that were used to artificially propagate the rice beetles in the first and second generation