In recent years, due to the greenhouse effect caused by air pollution, the global winter climate has warmed up year by year, and the direct impact is that various diseases and insect pests are also active in winter. Mesophyllum is one of them, almost all any part of the garden plant is its target, it relies on sap for food, the affected plants not only grow poorly, but also will appear yellowing of leaves, early leaf fall and other phenomena, serious will make the plant wither and die. Therefore, the winter control of mesozoans has also become a major problem in front of us. The main insects that appear in winter are the bran shield borer that harms camellia, the arrow-tip shield borer that harms the large-leaved boxwood, and the white-wheeled shield borer that harms the moon season. The following is a brief analysis of some of the measures taken to control winter.
1. Agricultural prevention and control
1. Winter cut clear garden
Seize the winter leisure to completely clear the garden, combined with winter pruning to remove dead branches and leaves, in order to ventilate and transmit light, reduce humidity, create living conditions that are not conducive to mesophoria, achieve the purpose of controlling their reproduction, and cut off the branches that have eggs, nymphs or adult insects. Removing dead leaves of trees and shrubs, eradicating weeds to eliminate wintering insects and destroying their overwintering sites, and burning the cut branches and weeds in a concentrated manner, or piling them up at high temperatures far from the planting area for fertilizer, can effectively eliminate mesolars and other pests that live in dead leaves.
2. Scraping and protecting injuries
Use a knife to gently scrape the bark, coarse bark of the tree, the twisted bark and pests that are often hidden in the cracks, and scrape off the bark, especially at the right and root necks. When scraping the bark, it is necessary to master the principle of light scraping and shallow scraping, so as to see the tender bark. In addition, plastic sheets and other items should be laid under the canopy before scraping the bark, so that the scraped bark chips can be processed or burned centrally. It is also possible to scrape off lichens, mosses, etc. that grow at the base of the trunk, and spray the shaved branches with a small sprayer once 3-5 times. Stone sulfur compound, can effectively control the shell insects.
3. Whitewashing
In winter, the white coating agent can be brushed at the base of the trunk to prevent insects and antifreeze, that is, 0.5 kg of lime, 0.5 kg of sulfur powder, 200 grams of rosin, 50 grams of salt, 20 to 25 kg of water are blended into a pulp, so that it is easy to brush and will not flow off.
4. Artificial prevention and control
In the event of severe plants, bamboo brushes, grass handles, rags, cloth soles and other tools can be used to obliterate the overwintering insects and eggs densely on the branches before the winter plant dormancy period to the next year before germination, such as mulberry white borer, Korean bulbous solidworm and apricot bulbous solid beetle, etc., can also be wiped off or scrubbed with water with wet cloth, or use scotch tape to glue off the body of the overwintering insect that can be observed on individual branches or leaves, and then destroy the brushed insect body in a concentrated manner.
2. Physical prevention and control
In the coldest of winter, the tree can be sprayed with a sprayer, a thin layer of ice can be formed on the branches, and in the afternoon, the branches or vibrating branches can be beaten with a wooden stick to make the ice vibrate with the shell insects.
Third, chemical control
1. Apply
For some domestic flowers, small cotton balls can be soaked in 50 ml of vinegar or a certain amount of alcohol, and gently rubbed on the stems and leaves of the affected plants to kill the shell insects. This method is convenient and safe, which can not only achieve the purpose of pest control, but also make the damaged leaves return to green and bright.
2. Spray
When the mesophyllus is dormant and overwintering, the control of the agent is still a necessary means, and it can be sprayed once with 1o to 15 times the pine resin mixture or 4o to 5o times the oil emulsion to eliminate the overwintering females, or before winter and spring germination, spray Baumedo 30 to 50 stone sulfur compound or 3% to 5% diesel emulsion to eliminate the overwintering nymphs. Note that the pine resin mixture and the stone sulfur compound should be used more than 15 days apart to prevent drug harm.