Tomato tea Astragalus membranaceus is a major pest infestation of tomato, mainly in the tender young parts of the tomato, such as buds that have not yet been displayed, so that the leaves become thicker and stiffer, smaller and narrower, and the back of the leaves is yellow-brown or gray-brown with oily luster. The leaf margin turned hard and brittle towards the back, and the plant was severely degenerated. The flowering result was not normal, and the flower bud was deformed and the young fruit was stiff. The prevention and control method of tomato tea sorghum is as follows:
During tomato growth and development, pay attention to the growth point and leaves of the tomatoes, and find that the growing point is dead and the leaves are twisted. When the thickness is thicker and stiffer, the leaves are sprayed with 1500 times 5% avermectin aqueous solution or 1500 times. 20% solution of WP wettable powder, or 1500 times of 10% aqueous solution of tetrazine wettable powder, or 3000 times of 50% aqueous solution of spirooxa ester, or 1500 times of 0.5% aqueous solution of dimethyl disulfide, or 1500 Use 73% Keteite solution for prevention and control, spray once every 7-10 days, spray 2 or 3 times continuously, uniformly wet all leaves and fruits.
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