Which parts should be paid attention to when administering cotton medicine?

Practice has proved that management is the key to high yield of cotton. Spraying is an important link in the growth and management of cotton. Cotton pests often occur: aphids, red spiders, blind Toona sinensis, red bollworm, cotton bollworm, gold steel drill and so on. The spawning and harmful parts of these pests are different, so attention must be paid to the parts when administering medicine.

Cotton seedling stage, aphids, red spiders and other harm on the back of cotton leaves, spraying pesticides, the potion should be sprayed on the back of the leaves. In the middle and later stage of cotton, red bollworm lays eggs on the back of tender tip, tender stem and tender leaf, and most of the eggs lay between the sepal and boll shell after boll setting, and the larvae do harm to the young. The eggs of Helicoverpa armigera lay on the front of cotton leaves, and the larvae bite buds, flowers and bolls. The eggs of the blind Toona sinensis are laid in the leaves, and the young pierce and suck the juice of the tender leaves and buds.

To control red bollworm, the potion should be sprayed on the lower green boll; to control cotton bollworm, the potion should be evenly sprayed on the front and tender tip, stem, leaf and bud boll; blind Toona sinensis has a large amount of activity, and the potion should be sprayed on the front, tender, stem and boll of the leaves.

Please pay attention to the vast number of cotton farmers: when spraying cotton, it is necessary to protect the flowers and bolls. Cotton usually blossoms in the morning. If spraying at this time, it is easy to make the pollen grains swell and break, affecting normal pollination, while spraying after 04:00 in the afternoon, the pollination process is basically over, and the effect of spraying is relatively small.