Right now, temperatures in the north are getting colder every day. At this moment, a disgusting insect is climbing down from a tree, ready for winter. If you live in the countryside, you can see this bug next to a tree or on a telephone pole in the countryside. This bug is covered with white hair, which makes people very disgusted after watching. If you see this bug, you must step on it to death, otherwise you will have endless troubles.
This is not alarmist to say, this kind of white-haired bug is famous, this is the "American white moth". The bugs we see are the third generation of larvae of the American white moth. Native to North America, the American white moth is a white-colored moth with a body length of about one centimeter, an orange-yellow basal segment of the forefoot, a gray-green to black-gray larvae, and a body covered with white to gray hairs.
When it comes to the harm of the American white moth, it is known as a "smokeless fire". The main hazards are: one is the food mixture, the larvae eat more than 300 kinds of plants; the second is a large amount of reproduction, breeding 3 generations a year, can reproduce to tens of millions, up to 100 million heads; third, strong adaptability, larvae over 3 years old can tolerate hunger for more than 7 days; fourth, the transmission route is wide, old mature larvae, pupae, adult insects can be spread with forest products and means of transport. These characteristics determine that the American white moth is extremely prone to outbreaks, so it is also known as "smokeless fire".
At present, the white-haired larvae we have seen are the third generation of the American white moth, and this season is the peak of the year when the American white moth is the most harmful. Because this season, the American white moth will overwinter under the tree pupa, so the "caterpillar" is easily observed. And at this time, it is the best time to control the American white moth.
The control methods of the American white moth are divided into artificial control, drug control, biological control, and physical control, and most of the things we farmers can do are artificial control and drug control. Among them, artificial control includes: artificial moth hunting, adult feathering period of daily dusk or early morning on poles, trunks, walls and other upright moths. Cut the screen, and cut the screen during the larval screen period for centralized destruction. Artificial pupae, before the American white moth pupates pupae, tie grass at about one meter from the ground from the trunk to trap pupae, centralized destruction, but also in the pupal stage digging pupa elimination.
The method of drug control of American white moth is to spray drugs such as urea, matrine, bitter tobacco emulsion, and hypertonic phenoxyvirus in the larval stage of the larvae, and the effect is good. Of course, the prevention and control of the American white moth is not only a farmer's business, only our national mobilization can curb the development and spread of the American white moth insect infestation.