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农户购到和使用的农药,都是以某种剂型的形式出现的,剂型就是将农药原药加工成便于使用的一定形态。常见的农药剂型有:粉剂、可湿性粉剂、乳油(或称乳剂)、颗粒剂、水剂、烟剂、超低容量油剂等。选用时应根据各剂型的特点、作物类别、气候状况等条件,有针对性地选择,才能充分发挥农药的药效,获得最佳防治效果。 1.注意剂型的特点:乳剂喷施后,只有粘附性好,湿润展着性强,残效期长的特点,因此加水稀释后广泛用于喷雾使用,还可用于拌种、涂茎、配制
Pesticides purchased and used by farmers all appear in the form of a dosage form that processes the original pesticide into a convenient form for use. Common pesticide formulations are: powder, wettable powder, EC (or emulsion), granules, water, smoke, ultra-low-volume oil and so on. Selection should be based on the characteristics of each dosage form, crop type, climate conditions and other conditions, targeted selection, in order to give full play to the efficacy of pesticides to obtain the best control effect. 1. Pay attention to the characteristic of the dosage form: After spraying, it has the characteristics of good adhesion, wet spreading and long residual period. It is widely used for spray after diluted with water. It can also be used for dressing seed, coating stem and preparing