Control methods of flower whitefly and understand the cultivation techniques of edible fungi

Bemisia Tabaci is an insect of the family Homoptera, which is 0.95 to 1.4 mm in length, winged and covered with wax powder. Adults can fly at close range, and when their mouthparts are inserted into the leaf tissue, they lose the ability to move and begin to live a fixed life. The flowers damaged by whitefly include golden bell, five-colored plum, Fusang, rhododendron, rose, hydrangea, jasmine, a bunch of red, pomegranate, kumquat, sweet-scented osmanthus, gardenia, etc., which can occur for more than ten generations a year, nymphs and adults can be harmful. Adults and nymphs in the Qinling Mountains can not winter in the open field, but can overwinter in the greenhouse in the form of eggs, nymphs and so on.

Whitefly uses mouthparts to suck the sap of the host plant, which makes the damaged leaves fade green and yellow, wilt and die, and can spread virus disease. In addition, whitefly can also secrete honeydew, cause coal pollution, block plant stomata, affect photosynthesis, serious flowers can not grow and develop normally. The control measures are as follows:

1. Timely prevention and control of whitefly in flower growing period, spraying with 1000 times EC of prolactin in time can inhibit adult oviposition and nymph hatching. It can also use 2.5% enemy to kill 2000 times liquid spray, which has a good control effect on all kinds of insect states. Spraying should be carried out when there is less adult activity in the morning and late, first spraying the front of the leaf, and then spraying the back of the leaf.

Second, yellow board trap with transparent wide tape, glue surface fixed on yellow cardboard or wood, hanging near the affected plant, can trap and kill whitefly adults, but also kill winged aphids. Change the tape when it is full.

Avoid cross-infection in flower beds and near greenhouses to avoid planting vegetables and crops that are susceptible to whitefly, such as cucumbers, eggplants, tomatoes, beans, etc., and cruciferous crops. Flowers susceptible to whitefly should not be put together as far as possible. The flower nursery should choose the place where there is no insect source, and the plants that are pest-free should be selected for picking scions and cuttings.

Fourth, do a good job of overwintering prevention and control and reduce the number of insect population before flowers enter the house in northern winter, ignite the fumigation greenhouse with a mixture of sulfur, sawdust and wheat straw. Then carry on the strict inspection to the potted flowers, do not bring whitefly into the room. After the whitefly is found indoors, it can be fumigated with 80% dichlorvos EC. If the dosage is 1 ml per cubic meter, you can light the liquid on hay or sawdust and close the doors and windows for more than 4 hours.