Continuous high temperature, drought, mite pests (red spiders, tea mites, white spiders, etc.) into a period of high incidence of harm, remind everyone to prevent and control in time! When the temperature is 25-30 ° C, mite pests can breed 1 generation in about 5 days, and the reproduction rate is very fast, which is particularly prone to large occurrence!
There are two peak periods of red spiders a year, April-June, August-October, in all kinds of insect pests, the control of red spiders is one of the insect pests that spend the most money and energy, and red spiders are already the heart of many growers.
There are 6 common types of pest mites
1. Diplodophyllum vulgaris
After the temperature rises, the diplodocus (also known as the white spider) enters a period of rampant harm. From June to July, the mites seriously harm apples, peach trees and pear trees.
(1) Harmful crops:
There are many crops that are harmed by dime-spotted mites, mainly soybeans, peanuts, corn, sorghum, apples, pears, peaches, apricots, plums, grapes, cotton, beans and other crops.
(2) Typical hazard symptoms:
The bizyged leaf mite prefers to harm the leaf flesh on both sides of the main vein of the leaf, if you find that the leaf flesh on both sides of the main vein of the leaf has faded green and yellow, you need to pay attention to it, then the back is likely to have been endangered by the leaf mite.
In addition, the dimorphed leaf mite will not only harm the leaves of plants, but also spread the virus while harming the leaves, resulting in uneven crop leaves, and sometimes drying out.
2. Citrus full claw mite
(1) Citrus full claw mite identification:
Citrus full-clawed mites mainly suck the leaves of crops, resulting in many small gray-white spots on the surface of the affected leaves, and the leaves lose their luster. When it is more severe, the surface of the fruit will also be covered with gray-white green spots.
3. Apple full claw mite
(1) Harmful crops: Apple full claw mites, also known as apple red spiders, occur on pears, apples, peaches, plums, apricots, hawthorns, grapes, walnuts and other fruit trees.
(2) Hazard symptoms: Apple full claw mites mainly suck the juice of leaves and young shoots, resulting in green discoloration of the harmful parts. For example, when the apple full claw mite harms the leaves of crops, many obvious green spots are produced on the front of the leaves, and in the later stage, the leaves become grayish-white. In severe cases, the leaves turn yellowish brown and the surface is covered with mites (the shell of molted mites).
4. Cinnabar leaf mites
After entering the high temperature, the number of cinnabar leaf mites gradually increases, and by July this is also the main period when they harm vegetable and fruit trees, and everyone needs to strengthen prevention.
(1) Cinnabar leaf mite identification:
(2) Harmful crops:
Cinnabar leaf mites mainly harm crops such as eggplant, pepper, watermelon, beans, and green onions.
(3) Typical hazard symptoms:
Mainly by adult mites or young mites sucking sap on the back of the leaves, the hazard occurs, resulting in many gray-white dots on the leaves, and if it is serious, it will directly dry up and fall in the later stage.
Like what:
After the leaves of crops such as eggplant and pepper are damaged, small gray-white dots appear on the leaf surface, and the leaves become gray-white in the later stage.
After the leaves of the four seasons of beans, cowpeas and melons are damaged, they form dry yellow spots on the leaves, and in severe cases, the whole leaves dry up and fall off.
5. Gall mites
(1) Typical hazard symptoms: Gall mites mainly harm fruit trees and the leaves or fruits of crops.
After the gall mite harms the crop, it will stimulate discoloration or deformation of the affected part, or form a gall (a deformed tumor or protrusion that grows after the crop is eaten or harmed by the pest).
6. Tea yellow mite
Tea yellow mite is a more serious mite pest on vegetables, and the harm in the greenhouse has gradually increased in recent years, and the number has gradually increased.
(1) Appearance under the microscope:
(2) Harmful crops: Tea yellow mites mainly harm cucumbers, eggplants, peppers, potatoes, tomatoes, melons, beans, radishes and other vegetables.
(3) Typical hazard symptoms: adult mites and young mites are concentrated in the young parts of crops, especially on buds, leaves and flowers that have not yet unfolded, and suck sap. After the leaf is damaged, it thickens, becomes smaller and narrower, and the damaged part has a greasy feeling, the leaf edge is curled, and it becomes hard and brittle.
After the young stems are damaged, they twist, shorten the internodes, and in severe cases, the top dies and stops growing. After the fruit is damaged, the epidermis appears yellowish brown, rough patches, the fruit is stiff, and some fruits are expanded and the epidermis is cracked.
Prevention and control methods
For the control of mites, mainly to prevent, especially in high temperature and dry weather, the reproductive ability of pests is stronger, we must not find pests before the pesticide is sprayed again, to prevent.
1. Chemical control
The agents for the control of mites mainly include avermectin in insecticides, acaricides such as azole ester, spironite ester, biphenylhydrazine ester, ethanazole and the like.
However, although these agents are used to kill mites, the control effect of different agents on various mite pests is very different, for example, some acaricides are ineffective against adult mites and effective for other forms, while some agents are effective for eggs, young mites, etc. and ineffective against adult mites.
Recommended antidotes:
Longshida is developed for the characteristics of resistant red spider and tea yellow mite, using cutting-edge original drugs and imported auxiliaries and chemical control technology to create, the all-clawed mite, the two-spotted leaf mite, the cinnabar leaf mite, the tea yellow mite and the gall mite in the confrontational area are outstanding, and the insect and egg double killing can effectively prevent and control the outbreak of mites.