大棚烟雾剂使用四要施放时间要选准。日光照射下，作物植株表面温度与烟雾剂颗粒温度相同，药剂不易在作物上沉积，影响药效。因此．最好日落后施放。施放方法要科学。烟雾剂在大棚内应均匀摆放。点火时按由里往外的顺序用暗火点燃，着火冒燃后密闭大棚过夜，次日早晨开棚... Greenhouse aerosol use four to cast the time to be selected. Under daylight, the surface temperature of the crop plants is the same as that of the aerosol particles. The medicaments are not easily deposited on the crops and affect the efficacy. therefore. Best to cast after sunset. Casting method to science. Aerosol in the greenhouse should be evenly placed. Ignition by the order of from the inside out with dark fire ignited the fire closed the greenhouse overnight, shed the next morning ...