Vegetable pests spraying techniques

Wide variety of vegetable pests, but can be summarized as suck juices, fresh leafy and boring classes three categories. Each type of pest habits are not the same. According to their character and individuality as well as the growth characteristics of the host, targeted spraying control, make direct contact with the parasite agents, achieve better control effect.

1, spraying techniques and pest infestation habits and living habits are closely related to aphids suck juices and some leaf-eating pests concentrated in the dorsal and twigs parasitic infestation, it should be a "little circle" approach to spraying, namely spray nozzles garden sprayers spray plant leaves bear the first lap, and then spray it buckle in the tender head, thus making contact with all pharmaceutical plants and parasites, to receive better control effect. Spodoptera exigua, beet armyworm larvae daytime hiding old phenomenon, so the growing season spraying control such pests, preferably in the evening. Borer pests cabbage webworm spraying time must be at the peak of hatching.

2, spraying technology but also with the growth characteristics of the host is closely related to the summer cowpea flowering time around in the morning 7:30-10:30, after all this time its petals closed. Cowpea early instar larvae borer infestation dispersed or concentrated, tree sprayer spraying at 9:00 in front as well, so that we can make more fully exposed to the parasite agents, or missed opportunities. Kale leaves covered with a layer of wax, with a biological insecticide Bt Pieris rapae, often adding 0.1% in liquid detergent, the purpose is to reduce the surface tension of the liquid evenly distributed in the leaves, improve control effect.