When it comes to the physical control of pests, the sticky worm board is the first measure to promote. Armyworm board insecticide is a physical control technique that uses the color-oriented nature of insects to trap agricultural pests by applying sticky shellac, butter or oil to different colors of paper (board). This method is convenient to use, low cost, good control effect, can reduce the amount of pesticide use, improve product quality and safety. The sticky insect board not only has a good sticky killing effect on small pests such as whiteflies, thrips, mites, aphids, etc., but also can stick to kill mosquitoes, flies, etc., but the sticky insect board is not set casually.
<h1> First, according to the control object to choose the color of the armyworm board. </h1>
At present, there are two main types of armyworm boards on the market: yellow and blue. Whiteflies, aphids and other pests have a strong tendency to yellow, thrips have a tendency to blue, vegetable farmers can set up yellow plates in the shed to kill whiteflies and aphids, and set up blue plates to trap thrips. The shed where these pests occur at the same time is recommended to be used with yellow plates and blue plates. Yellow plates and blue plates are usually suspended, which can trap and kill a variety of pests such as whiteflies, thrips, mites, aphids and so on.
<h1> Second, the suspension height should be appropriate. </h1>
Regardless of the yellow or blue plate, the height of the suspension when trapping is important. The position of the sticky insect plate is different, and the killing effect of pests is also different. Vegetables in seedlings, the height of the yellow plate suspension should be higher than the seedling 10-15 cm, when the plant height grows close to the armyworm plate, the armyworm plate should be adjusted with the increase of the plant; when setting the blue plate, the hanging height should be the same as the crop. In addition, during the high and low temperature seasons, the suspension of the armyworm board is also different. In the winter low temperature season, the light and temperature in the upper part of the plant, especially near the growth point, are very suitable, and the pests mostly feed on the young parts of the growth point here, so the sticky insect board should be hung near the growth point. In the summer high temperature and strong light season, pests are mostly hidden in the shade between plants to feed, so most of the armyworm plates should be placed in a position of about 15 cm below the growth point between plant rows during this period. The sticky worm board can be fixed with a bamboo pole or suspended directly from a sling.
<h1> Third, determine the number of armyworm boards to use. </h1>
In the greenhouse, about 30 armyworm boards of 25 × 13.5 cm in size are generally placed per acre, or about 20 armyworm boards of 40 × 25 cm in size, and evenly distributed. In addition, after the sticky insect board hangs for a long time and is full of pests, its armyworm capacity is greatly reduced, and it should be replaced in time. (Source: Agricultural Science and Technology News, Author: Wu Rongmei)