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(一) 药害经过 1.1983年农9队汕优6号药害情况:该品种5月22日播种,6月24日栽插,7月6日误将绿麦隆当作除草醚,亩用0.55～0.6公斤,拌15～20公斤泥沙撒施,施药时气温偏高(32℃左右)。施药后一周出现较大范围的药害,似枯心死苗,当时即按除草醚药害处理,换清水一次,追施适量氮肥。但经数天后情况仍继续恶化,出现成片枯死,有的全田死亡,从而进一步作详细调查,情况如下: (1) 稻株药害症状:从老叶叶尖开始枯黄,继续向下及心叶蔓延,最后全株茎叶枯死。
(A) after the injury through the 1983 agricultural 9 teams Shanyou 6 phytotoxicity situation: the varieties sown May 22, June 24 planted, July 6 mistakenly put the use of chlorotoluron as weeding ether, mu 0.55 ~ 0.6 kilograms, mix 15 ~ 20 kilograms of sand application, spraying temperature is high (about 32 ℃). A week after the application of a larger range of drug injury, it seems dry heart seedlings, then weeding treatment of pendimethalin, change water once, topdressing amount of nitrogen fertilizer. However, after a few days, the situation continued to worsen, witnessing a death to death and some death in the entire field. Further investigations were conducted as follows: (1) The symptom of rice plant injury: yellowing from the tip of the old leaves, continued downward and Heart leaves spread, the whole plant stems and leaves withered.