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近年来,上海郊区推广使用二甲四氯、除草醚防除水稻秧田杂草取得一定成效。但由于二甲四氯不除稗草,除草醚虽能杀死稗草,但受到雨季或暴雨的冲刷,效果就很差,甚至还会因稻芽浸在含有药液的水中而造成药害。为此,需进一步寻找安全有效的新药剂。我们进行了杀草丹秧田除稗用药量和施药方法的小区试验,每区一分地,重复2次,用药后20天调查,结果如下: 1.苗前处理: 做好秧板后立即用药,用木板塌一下,隔三天播种,再塌谷,每亩用10％杀草丹2、3、4斤,除稗效果分别为72.60％、94.52％、98.68％,对异型莎
In recent years, Shanghai suburbs promote the use of MCPA, weed control of weeds in rice plants achieved some success. However, since MCPA does not remove barnyardgrass, weeding ether can kill barnyardgrass, but its effect is very poor when it is washed by the rainy season or heavy rain. It even causes phytotoxicity due to the rice bud immersed in the water containing the medicinal solution . To this end, we need to further find safe and effective new agents. We conducted a grass-killing Dan seedlings in addition to the barnyard drug dosage and application methods of cell testing, each district a minute, repeated 2 times, 20 days after drug investigation, the results are as follows: 1. Pre-emergence treatment: seedlings immediately after doing a good job Medication, with a piece of wood collapsed, sowing three days later, and then fall valley, with 10% to kill 2, 3, 4 kg of grass per acre, except for the effect of barnyardgrass were 72.60%, 94.52%, 98.68%