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施药时期要适时适时施药,就是指除草剂与小麦生育期和外界环境条件的有机结合。施药时既能发挥药剂的最佳防除效果,又不会对麦苗产生药害。 (一)小麦生育期与除草剂配方的选择 1.小麦拔节前选择的除草剂配方有:2甲4氯加百草敌,或2甲4氯、百草敌分别单用。在黄淮海流域常规安全施药时间,一般是在3月上旬至4月初。2.小麦拔节后至孕穗期前,均可选用2甲4氯、苯达松、施它隆单用或混配使用。
Appropriate timely application of pesticide application period, refers to the herbicide and wheat growth period and the external environmental conditions of the organic combination. When spraying the best of both agents can play a preventive effect, but will not produce harm to wheat seedlings. (A) the growth period of wheat and the choice of herbicide formulations 1. Select the herbicide formulations before jointing wheat: 2 A 4 chlorine plus paraquat enemies, or 2 A 4 chlorine, paraquat alone were. In the Huang-Huai-Hai basin conventional safe application time, usually in early March to early April. 2. After jointing wheat to booting stage before, can choose 2 A 4 chlorine, bentazon, cast it long alone or mixed use.