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返青拔节阶段重点是做好病虫草监测,预报和早发病虫草的防治工作。 (一)主要病虫草的监测及预报。调查白粉病、地下害虫等病虫的发生情况,结合天气预报作出发生程度和防治适期的预报。 (二)作好早发病虫草的防治。 1、地下害虫。未经拌种、返青后死苗率达10％的田块,可结合锄地用50％辛硫磷乳剂1份加土200份配成毒土撒施,或亩用50％甲胺磷或50％1605乳剂100毫升加水3公斤稀释,均匀喷在2.5公斤麦麸上,制成毒饵,于傍晚撒入麦田。 2、白粉病:早期病株率达3—5％时,每亩用粉锈宁有效成份3克,加水20—30公斤喷洒。 3、杂草防除。在小麦分蘖盛期(4—5叶)亩用72％2.4—D丁酯50毫升或20％2甲4氯100毫升加水20公斤喷雾防治。
Rejuvenation join stage focus is to do a good job monitoring and forecasting of pest and disease Cordyceps, early prevention and treatment of Cordyceps. (A) monitoring and forecasting of major diseases and insect pests. To investigate the occurrence of pests such as powdery mildew and underground pests, forecast the occurrence degree and prevention and control of malaria according to the weather forecast. (B) make early onset Cordyceps prevention and treatment. 1, underground pests. Without seed dressing, the rate of dead seedling rate of 10% after returning to green can be combined with hoeing with 50% phoxim emulsion plus 200 parts of soil to soil, or 50% of methamidophos or mu 50% 1605 Emulsion 100 ml water 3 kg diluted evenly sprayed on 2.5 kg of wheat bran, made of bait in the evening into the wheat fields. 2, powdery mildew: the rate of early diseased plants 3-5%, the effective ingredient 3 grams per acre with triadimefon, add water 20-30 kg spray. 3, weed control. In wheat tillering period (4-5 leaves) with 72% 2.4-D butyrate 50 ml or 20% 2 A 4 chloride 100 ml water 20 kg spray control.