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近年来,稻纵卷叶螟上升为我县水稻主要害虫,其防治适期短,一旦错过,收效甚微。前几年多数使用1605,防效虽好,但防治适期正处于高温季节,易引起中毒。为寻求取代1605的高效低毒的农药,我们在1985年对久效磷防治纵卷叶螟的施用技本进行了试验。 供试药剂为南通农药厂生产的40％久效磷。试验田选择在长势好,三代虫口基数大,基本无二代纵卷叶螟危害的晚稻田。地点在张黄港乡洪港六组。设:(1)不同浓度试验,8月15日施药,亩喷稀释液150斤,分3000倍(25毫升/亩)、4000倍(18.75毫升/亩)、5000倍(15毫升/亩)三个处理;(2)不同次数试验,亩施药25毫升,喷稀释液150斤,施药1次(8月15日)和施药2次(8月15日、22日);(3)不同
In recent years, the rice leaf roller Rise to rise as the main rice pests in our county, its control period is short, once missed, with little success. Most of the previous years, the use of 1605, although the good control effect, but the control period is in the hot season, easily lead to poisoning. In order to seek efficient and low toxicity pesticides to replace 1605, we tested the application of monocrotophos to control the leaf roller in 1985. Test agent for Nantong Pesticide Factory production of 40% monocrotophos. Experimental field selection grows well, the third generation of large population base, basically no second generation late leafroller damage late rice fields. Location Zhang Hong Kong Hong Kong Hong Kong six groups. Set: (1) different concentrations of test, August 15 application, mu spray dilution 150 pounds, sub-3000 times (25 ml / mu), 4000 times (18.75 ml / mu), 5000 times Three treatments; (2) different times of test, 25 ml of pesticide spraying, spraying 150 kg of diluent, spraying once (August 15) and spraying twice (August 15, 22) )different