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六十年代初,推广666、223粒剂防治玉米螟,把玉米螟的防治工作推进了一步。但是,适于心叶期施用的上述粒剂,不能很好地解决穗期的螟害,而穗期正是玉米螟为害减产的关键时期。针对这一问题,我们于1980、1981两年,采用国产的呋喃丹进行了玉米螟防治试验,现将试验结果整理于后。一,呋喃丹对玉米螟的防效显著优于666和223:1980年用3％呋喃丹粒剂(江苏铜仁农药厂产品)、0.5％666粒剂(6％666拌煤渣颗粒)、5％223粒剂(25％223乳剂拌煤渣颗粒)作比较试验,加对照区共四个处理,重复四次。小区面积三十分之一亩。手7月7日在心叶末期用药1次,每株2克。于药前及药后18天、26天调查被害株。结果
In the early 1960s, promotion of 666,223 granules against corn borer was taken as a step forward in the prevention and control of corn borer. However, the above-mentioned granules suitable for application at the heart-leaf stage can not solve the stem borer damage at the ear stage, and the spike stage is the crucial period for the corn borer to reduce its yield. In response to this problem, we in 1980, 1981, using domestic carbofuran for corn borer control test, the test results are now sorted out. The control effect of carbofuran to corn borer was significantly better than that of 666 and 223: In 1980, 3% carbofuran granules (products from Jiangsu Tongren Pesticide Factory), 0.5% 666 granules (6% 666 mixed coal cinder particles), 5% 223 granules (25% 223 emulsion mixed coal cinder particles) for comparative testing, plus control area a total of four treatment, repeated four times. One-thirtieth of the district area of ?? acres. Hand July 7 at the end of the heart of leaf medication 1, 2 grams per plant. In the pre-drug and drug 18 days, 26 days investigation victim strain. result