What are the hazards of aphids?

Aphids can spread viral diseases, reduce yield and endanger crop growth. Aphids suck the juice of crops, which will spread germs and make plants suffer from diseases, resulting in reduced production or death. Artificial control, biological control and chemical control can be used to control aphids, thus reducing the number of aphids.

The harm of aphids mainly includes direct harm and indirect harm: the direct harm is mainly that adult aphids and young aphids suck the juice of leaves, stems, tender heads and tender ears. Aphids mostly harm the front of the upper leaves of plants. After heading and filling, it proliferated rapidly and concentrated in the ear.

Aphids like to harm crops at seedling stage, and the damaged parts form withered spots, while other aphids have no such symptoms. Indirect harm refers to the simultaneous spread of wheat virus diseases by aphids, among which wheat yellow dwarf disease is the most harmful.

Aphids have tubular protrusions (abdominal tubes) on their abdomen. Aphids have a pair of abdominal tubes, which are used to discharge defense fluids that can quickly harden. The composition is triglyceride. The abdominal cavity tube is usually tubular, long and usually wide, with a thick bottom. They suck plant juice and are large plant pests. It not only hinders the growth of plants, forms galls and spreads viruses, but also causes deformities of flowers, leaves and buds.