Remove weeds and residues in time. Combined with thinning seedlings and pulling out insect seedlings; After the vegetables are harvested, the weeds in the field should be treated in time and the residual branches and leaves should be removed, so that some aphids can be eliminated. For greenhouse and other facilities cultivators, after harvesting vegetables, it is necessary to deal with the remaining stems and leaves in the greenhouse in time and take them outside the greenhouse for burning, so that the greenhouse can be clean and will not survive the summer and winter.
There are many kinds of aphids, wide hosts and fast reproduction. Myzus persicae and aphids are the main pests on eggplant. It is harmful for adult aphids and nymphs to gather on leaves, tender stems, tender shoots or pedicels to suck juice. The seedlings are damaged, the plants grow slowly, and the leaves shrink until they die; In adult stage, leaves are damaged and curled, which affects flowering and fruiting. Aphids can spread viruses only by sucking juice from mouthparts, causing greater harm.
Harm of aphids
Aphids behave differently on different plants. Vegetable aphids mainly appear on the back or tender leaves of vegetable leaves, which makes the leaves curl and deform and make the whole plant smaller. If it is a spherical vegetable, it will affect its package, resulting in losses and reduced production. If the remaining vegetables are attacked by aphids, they will not bear seeds and bloom, and in addition, they will spread viral diseases.
The harm of wheat aphid mainly includes indirect and direct aspects. The indirect harm is mainly that aphids spread wheat virus diseases while harming wheat, which brings greater harm and may lead to lodging and yield reduction. The direct harm is that aphids suck the juice of wheat stalks, leaves and young wheat ears, forming a certain dead spot, which affects the quality and yield of wheat.