In order to improve the yield and quality of fruit, reduce the number of spraying of pesticides , and increase the growth period of trees, new high-fat membranes can be mixed into low-toxic pesticides to enhance the efficacy and isolate pests and diseases. At the same time, we mainly master the following key periods in the prevention and control of pests and diseases.
First, the buds are obviously inflated, that is, the light rod medicine. In this period, high concentrations of fungicides and insecticides should be sprayed on the trees and under the trees. Mainly control a variety of wintering bacteria and pests.
The second is to spray a higher concentration of fungicides and insecticides during the bud period, mainly to control flower rot.
The third is to spray fungicides and insecticides one week after falling flowers, mainly to prevent a variety of diseases and aphids, red spiders, pear hibiscus and so on.
Fourth, after picking the fruit, spray a higher concentration of fungicides and insecticides before the leaves, mainly to eliminate the wintering pests and reduce the damage in the second year.
Non-tapping screws are machine Screw, the pieceworker to be fastened must be tapped with taps in the screw hole in advance to match the screw threads.
The difference between tooth screws and other screws depends on whether they can be used together with nuts. Tooth screws can be used with nuts. And relative to the screws of other teeth, there are self-tapping screws. The nut of this kind of screw has no bow teeth. As for the standard teeth and fine teeth are only different pitch, it is the nut of the machine screw
Hex Machine screw,pan machine screw,flat machine screw,truss machine screw,Hexagon socket screws
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