Tall flowers and trees to prevent pests and more
First, the drug ring touch. Use a deltamethrin or cypermethrin, talc, castor oil, and gypsum powder in a 1:1:20:40 ratio to prepare a chalk-like poisoning pen. Draw several closed medicine rings on the trunk. This method can deal with all kinds of pests that dormancy in winter and tree damage in spring. Second, the membrane ring barrier. Wipe off 5 cm wide rough skin on the easy-to-handle part of the tree trunk. Use a 5 cm wide plastic film tape around the rough skin to make a circle. The joint is overlapped by 2 cm and fixed with staples. (You can also fix it. The lower end of the membrane is tightly attached and the upper end is trumpet-shaped. Because the ring is smooth, it can stop pests from harming trees. This method can deal with larvae that are harmful to trees. Third, shave skin dressing. Wipe the rough skin with half the diameter of the trunk around the easy-to-handle parts of the tree trunk, enclose the cotton cloth or other absorbent material, and then wrap the two plastic films and tighten the two ends. The injected liquid is injected into the absorbent material. In this way, the drug solution can penetrate into the xylem vessels and be transported to all parts of the plant to kill pests and germs. Fourth, hole injection. At the base of the trunk, 1 to 3 holes are drilled with a carpenter's drill. The hole faces the trunk at an angle of 45 degrees downwards. The hole is deep to the pith, and the vertical distribution of holes and holes must be staggered. Fill the hole with the medicine solution, or hang the medicine bottle above the hole and stretch the two ends of the cotton core to the bottom of the hole and the bottom of the bottle respectively. In this way, the liquid can be delivered to all parts of the tree to kill pests and germs. Five, hanging insect corpse. The microorganisms invade the dead carcasses of dead insects and use gauze bags to hang them on trees with similar pests. The conidia on the corpses can infect the same pests and cause death. This method is suitable for the control of pests that are susceptible to fungal infections. Six, release the pests. Feeding pests that have been sprayed with live suspensions of micro-organisms or microbial pesticides, pests that have been or are about to die, to trees that have similar pests can cause the same type of pests to become sick and die. It must be pointed out that in the above method, the skin scraping dressing and the hole injection medicine should be stopped 40 days before the harvest of the edible fruits, so as to avoid using the tree-sensitive pesticide. The amount of the drug to be used should be tested in small quantities first, and after applying experience, it will be applied in large quantities. The use of holding insect corpses and release of pests and diseases should be carried out under the conditions of moderate temperature (25°C to 30°C) and high humidity (relative humidity of 85% or more) in order to obtain good results.