1. Morphological characteristics
The insect is listed as the first of the "five small pests" in the garden by the industry. It mainly goes through three stages: egg, nymph and adult.
Grasshoppers
Purple velvet beetle
Second, the characteristics of the hazard
Mesophyllum is one of the main sucking mouthpart pests that harm garden plants, mainly harming leaves, branches and fruits, and causing direct harm to plants by sucking plant sap.
Most males have wings and can fly, and females and nymphs live on branches or fruits for life, causing yellowing of leaves, wilting of branches, decline of trees, and easy to induce coal pollution. The insect is widely distributed at home and abroad, and the hosts are apples, pears, peaches, apricots, plums, cherries, loquats, persimmons, mulberries, ash, begonias and other agricultural and garden plants. Female adults and nymphs cling to branches, fruits and leaves. In severe cases, the shells overlap densely, the development of the victim plant is hindered, the tree is weakened, and even the branches or whole plants die. Garden plants where ticks occur are also prone to coal pollution, damaging the landscape and weakening the tree.
Common insects in the north include purple weed velvet beetle, grasshopper, turtle wax beetle, round wax bug, shield bug and so on.
Shellworms induce coal pollution disease
Third, the law of occurrence
The insects generally reproduce 1 to 7 generations a year, and the number of generations of different species of insects varies. Grasshoppers, Japanese turtle wax bugs are born once a year, blowing sponges and mulberry white bugs are generally 2 generations a year, with eggs or adults overwintering in the soil or stems, etc., and the next spring begins to hatch, lay eggs, and climb up the trunk to endanger.
Because most of the insects are wrapped in a thick waxy layer, the agent needs to penetrate the wax shell to contact the insect body, so it is very difficult to control.
Fourth, prevention and control methods
(1) Physical methods
1. In the spring season, wrap the film or anti-insect tape in the trunk about one meter to reduce the insect body to climb up to achieve the control effect, and the physical measures of grasshoppers can achieve good results.
2. Control the cultivation density, and combine pruning to remove the branches and leaves that occur heavily.
(2) Chemical prevention and control
1. Do a good job in clearing the garden, spray 1000 times liquid + Yingna 1000 times liquid in autumn, winter and spring, disinfect and sterilize the whole park, and reduce the incidence of shell insect outbreaks in the next year.
2. In autumn and winter and after the opening of spring, the trunk is coated white, and the lower part of the trunk is sprayed with drugs such as Bizhi and Zhike in the liquid membrane of Guoguang to eliminate insect eggs to achieve the purpose of prevention and control.
3. For the prevention and control that has occurred in time, it is recommended to use a highly permeable agent 800 times liquid + Lepu 150 times liquid + 750 times liquid of The killer for prevention and control. Prevention and control should be carried out in time during the peak period of egg hatching (usually in spring and summer).
Special note: The above plan is for reference only, do not copy and paste, if necessary, please call Guoguang's local technical representative.
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(Source: Guoguang Lecture Hall)