Hangzhou Network News Recently, on both sides of the East River, you can often see a number of garden workers whitening the seedlings in the river green space. In addition to keeping trees from freezing, whitening can also play a role in sterilization and insect repellency.
With the decrease in temperature in Hangzhou, diseases and insects have entered a dormant state of wintering, and the favorable weather provides a good opportunity for the prevention and control of diseases and insect pests. Since December 2017, the Hangzhou Municipal Urban Management Committee River Supervision Center has organized the comprehensive launch of winter protection work for 2.19 million square meters of river greening in 11 municipal pipe rivers, and the protection of green areas in the municipal pipe river is nearing completion.
Winter pest control can effectively curb the occurrence of pests and diseases, enhance tree potential and resistance, and ensure the good growth of trees. What prevention and control measures have been taken by the Hangzhou River Center to "beat the diseases and insect pests into the cold palace"?
Trunk focus on prevention and control
The coarse bark on the trunk and under the upturned bark are often the places where pests and germs such as red spiders, wood lice, square-winged web bugs and rotting diseases overwinter.
The green maintenance personnel of the city river center gently scrape the coarse bark, warped skin, and remove the egg cocoon on the trunk, and then whiten the tree pole, which can effectively eliminate overwintering bacteria, pests and eggs. At the same time, the susceptible plants such as plane trees, willow trees, and roses are checked, especially at the base of the trunk, and if they are found, they are immediately injected to control and not let go of a live insect of the tianniu.
Prune the branches and leaves of diseased insects
Pruning the branches and leaves of diseases and insects is one of the important links in winter garden management. Combined with winter pruning, focus on pruning the branches and leaves with diseases and insects, such as the insect eggs on seedlings such as the moon season, the shell insects on poplar, willow and flower shrubs, and the branches and leaves of the diseases and insects cut off should be cleaned up in time, transported out of the nursery for centralized destruction and treatment, and reduced the spread rate of diseases and insect pests.
Clean up dead branches and leaves
Most of the pathogens (bacteria) or overwintering eggs of seedlings and diseases and insects overwinter among dead branches and leaves or weeds in the green area, and will come out when the conditions are suitable in the coming year. Therefore, in winter, the dead branches and leaves and weeds in the green area are completely removed and destroyed, and the health situation is improved, which can greatly reduce the source of various diseases and insects. This has a significant effect on the control of anthrax, powdery mildew, rust, red spiders and moths of chrysanthemum, begonia and willow trees.
Now, hangzhou riverside has set up a "green space maintenance responsibility card", if the public finds diseases and insect pests, they can call the phone number of the maintenance unit on the sign, and the staff will go to deal with it in time.
(Hangzhou network reporter Liu Wenzhao)