The specific symptoms of gray mold of onion are: white oval or round spots will grow on onion leaves at first, and the diameter of the spots is about 1-3 mm at the beginning of the disease, which grows downward from the top of onion leaves, and finally the onion leaves die. The mouth suction device sucks the tender leaves and juice of the tender buds, and many small white spots with needle-like size appear. In severe cases, onion leaves turn yellow and white, which makes the leaves droop, twist and die, which can reduce production in a large area and is also the disseminator of many viruses, and its harm cannot be underestimated.

Gray mold is a typical disease that appears on green onions and other vegetables. There will be round or oval white spots on the leaves. They spread downward from the tip of the blade, and this disease will occur in the case of high temperature and rainy weather. Some bugs look like flies, but they don't look like flies. They should be other fly pests. I have seen them stay on onion leaves in the literature. The onion leaves are also a little white, the back is a little yellow and a little dry. It's not a disease, but pests and thrips. In order to control garlic thrips, nicotine insecticides can be used, such as imidacloprid, acetamiprid, veratrine, celangulin, bifenthrin, carbosulfan, spinosad, ethyl spinosad, auricularia and so on.

Some bugs look like flies, but they don't look like flies. They should be other fly pests. I have seen them stay on onion leaves in the literature. The onion leaves are also a little white, the back is a little yellow and a little dry. Some bugs look like flies, but they don't look like flies. They should be other fly pests. I have seen them stay on onion leaves in the literature. The onion leaves are also a little white, the back is a little yellow and a little dry.

Some bugs look like flies, but they don't look like flies. They should be other fly pests. I have seen them stay on onion leaves in the literature. The onion leaves are also a little white, the back is a little yellow and a little dry. It's not a disease, but pests and thrips. In order to control garlic thrips, nicotine insecticides can be used, such as imidacloprid, acetamiprid, veratrine, celangulin, bifenthrin, carbosulfan, spinosad, ethyl spinosad, auricularia and so on.