The scale insects that occur in our country include grasshoppers, pear orchard, Cornell mealworms, ball grasshoppers, and turtle wax. The main hazards are apples, pears, apricots, persimmons, peaches, peppers, and pomegranates. The nymphs and adults attach to the stems, fruits and leaves to absorb sap, causing branches to crack, dry, and fallen leaves. In severe cases, the entire plant is killed, and the fruit is deformed after being damaged, losing its commercial value.
Because the scale insects have one thing in common, that is, waxy layers are formed on the insect body. Some waxing and thickening occur on the back of the newly hatched nymphs from 3 days to 4 days. The conventional drugs are difficult to penetrate and touch the body, and thus it is difficult to control. Serious damage. In addition, the occurrence of various scale insects varies from time to time, and some occur early and some occur late. In this way, insects with different insect states existed at the same time, and general insecticides were effective only for newly hatched nymphs, but after the insects had long waxy backs, they were powerless.
There are two causes of serious scale insects: First, they did not seize the appropriate period of control; second, they did not choose drugs for prevention and control. Based on these years of experience, the control of scale insects should seize two key periods: the first time after convulsions until the buds sprout; the second between May and June eggs hatching and nymphs. In both periods, the scale shell and wax layer of the scale insects were not formed, and the insect body was extremely sensitive to the chemicals. However, most fruit growers did not seize these two critical periods. Instead, they applied the wax shells of the scale insects from July to September, with little effect.
Among commercially available pesticides, there are many varieties known to kill scale insects, but they are mostly made of omethoate, isocarbophos, 1605 and other old organophosphorus pesticides. Because they have been used for many years, they have outstanding resistance and are not good. Penetrants, agents can not penetrate the shell and wax layer, rapid culling has a strong stomach poisoning, contact and penetration, a variety of sucking mouthparts pests, chewing mouthpart pests, and parasites are good The killing effect. Because of its strong penetrating power, it can penetrate the shell and wax layer, and can penetrate the leaves to kill the insects on the back of the leaves. The effective period is more than 30 days. It is currently the best acaricide. Can be used to prevent and control 40% quick-eliminating emulsifiable concentrate 600 times before flowering or in the newly hatched nymph stage
Now I will introduce several new methods for the control of scale insects for reference in the production of fruit growers.
1. Artificial control method. That is, using a stick or the like to gently peel the scale insects from the plant body. The scale insects and the coal stain can also be wiped off with wet rags or scrubbed with water. The time is preferably selected from the nymphs and adult stages of scale insects such as females. When an adult spawns during the spawning period, it must pay attention to the eggs it produces - and scrape clean. The scraped body should be eliminated. During the winter pruning, scales with scale insects should be cut off as much as possible, and the branches and branches cut should be collected and burned. Manual control is a simple and easy method, but manual control is often incomplete
2. Apply dry method to prevent and cure. That is, 40% omethoate is added with 5:1 water and special effects king or harmed Liping is applied on the main trunk of 20 cm to 30 cm, wrapped with plastic cloth, and the plastic cloth is unrolled after 20 days. The old bark can be scraped and then dried.
3. Spray control. That is, 40.7% of Loxan was sprayed 1500-fold with imidacloprid 3000-4000 times.
4. Fire attack prevention and control. The firearm is tied with a waste cloth and ignited, and the damaged branch of the scale insect is used. The action should be quick and can play a very good control effect.
Because the scale insects have one thing in common, that is, waxy layers are formed on the insect body. Some waxing and thickening occur on the back of the newly hatched nymphs from 3 days to 4 days. The conventional drugs are difficult to penetrate and touch the body, and thus it is difficult to control. Serious damage. In addition, the occurrence of various scale insects varies from time to time, and some occur early and some occur late. In this way, insects with different insect states existed at the same time, and general insecticides were effective only for newly hatched nymphs, but after the insects had long waxy backs, they were powerless.
There are two causes of serious scale insects: First, they did not seize the appropriate period of control; second, they did not choose drugs for prevention and control. Based on these years of experience, the control of scale insects should seize two key periods: the first time after convulsions until the buds sprout; the second between May and June eggs hatching and nymphs. In both periods, the scale shell and wax layer of the scale insects were not formed, and the insect body was extremely sensitive to the chemicals. However, most fruit growers did not seize these two critical periods. Instead, they applied the wax shells of the scale insects from July to September, with little effect.
Among commercially available pesticides, there are many varieties known to kill scale insects, but they are mostly made of omethoate, isocarbophos, 1605 and other old organophosphorus pesticides. Because they have been used for many years, they have outstanding resistance and are not good. Penetrants, agents can not penetrate the shell and wax layer, rapid culling has a strong stomach poisoning, contact and penetration, a variety of sucking mouthparts pests, chewing mouthpart pests, and parasites are good The killing effect. Because of its strong penetrating power, it can penetrate the shell and wax layer, and can penetrate the leaves to kill the insects on the back of the leaves. The effective period is more than 30 days. It is currently the best acaricide. Can be used to prevent and control 40% quick-eliminating emulsifiable concentrate 600 times before flowering or in the newly hatched nymph stage
Now I will introduce several new methods for the control of scale insects for reference in the production of fruit growers.
1. Artificial control method. That is, using a stick or the like to gently peel the scale insects from the plant body. The scale insects and the coal stain can also be wiped off with wet rags or scrubbed with water. The time is preferably selected from the nymphs and adult stages of scale insects such as females. When an adult spawns during the spawning period, it must pay attention to the eggs it produces - and scrape clean. The scraped body should be eliminated. During the winter pruning, scales with scale insects should be cut off as much as possible, and the branches and branches cut should be collected and burned. Manual control is a simple and easy method, but manual control is often incomplete
2. Apply dry method to prevent and cure. That is, 40% omethoate is added with 5:1 water and special effects king or harmed Liping is applied on the main trunk of 20 cm to 30 cm, wrapped with plastic cloth, and the plastic cloth is unrolled after 20 days. The old bark can be scraped and then dried.
3. Spray control. That is, 40.7% of Loxan was sprayed 1500-fold with imidacloprid 3000-4000 times.
4. Fire attack prevention and control. The firearm is tied with a waste cloth and ignited, and the damaged branch of the scale insect is used. The action should be quick and can play a very good control effect.
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