Comprehensive pictures of garlic diseases and their prevention and treatment

A complete picture of garlic diseases and prevention and control methods are as follows:

1. Garlic leaf blight

Garlic leaf blight is characterized by withering and yellowing of the leaf tips. There are stripes on the leaves that run across the entire leaf, developing along the middle rib or on one side of the leaf. The lesions expand and turn into gray-yellow or gray-brown. When the air humidity is high, dark brown mold grows densely on the surface of the lesions. Viral diseases manifest themselves as obvious mosaics on the leaves, sometimes chlorosis or yellow stripes, twisted and deformed leaves, withered and yellow leaf tips, etc. ?

Control methods: Strengthen cultivation and management, cultivate strong plants, and enhance disease resistance. Strengthen field drainage, reduce field humidity, control disease conditions, and avoid damaging leaves during field operations to reduce wounds and avoid artificial spread of the disease in the field. ?

In the early stage of the disease, spray mu with 20% virus A2 wettable powder 500-1000 times or 1.5% Phytosis EC 1000 times to prevent viral diseases. Use 800-1000 times liquid of 50 Sokling wettable powder or 800 times liquid of 50 chlorine wettable powder or 500 times liquid of Mancozeb 70 to control garlic leaf blight.

2. Bacterial soft rot?

After garlic is infected, the disease first starts from the leaf edge or midrib, and yellow-white stripes form along the leaf edge or midrib, which can penetrate the entire leaf. When the humidity is high, the diseased area will appear yellow-brown and soft-rotted. Generally, the disease occurs first on the lower leaves, and then gradually spreads to the upper leaves, causing the whole plant to wither and die.

Prevention and control methods: When the disease occurs, you can spray it with oxamexyl, copper ammonia, Bacillus subtilis, etc. ?

3. Garlic sclerotinia?

The onset site is at the base of the garlic pseudostem under the film. The initial lesions are water-soaked, and later darken to gray-white, causing ulcers and rot. Emits a strong garlic smell. After the garlic leaf sheaths rot, the upper leaves will wilt, gradually turn yellow and die, and the garlic roots and root discs will rot and fall apart. ?

Prevention and control methods: After the onset of the disease, pesticides such as meprofen, iprodione, cyclostrobin, and boscalid can be used for spray control. ?

4. Phytophthora root rot?

This fungus mainly damages garlic roots and bulbs. In the early stage of the disease, the roots are water-soaked and gradually turn brown and rot. The bulbs in the root disk turn brown; the leaves of the infected plants gradually turn yellow from the bottom upward, dry up and die, the plants are obviously dwarfed, the garlic sprouts are short and short or do not bolt, and the severely diseased plants cannot produce yield or the whole plant dies. ?

Prevention and control methods: After the onset of the disease, you can spray the base of the stem with copper tyrosine, Bacillus subtilis, or amoxicillin to control it. ?

5. Onion field fly

The larvae of the onion fly burrow into the garlic bulbs, causing rot, yellowing, wilting of leaves, and even death in pieces. ?

Prevention and control methods: Mainly through soil treatment before sowing, chemical seed dressing, initial spraying, etc. Effective chemicals include phoxim, chlorpyrifos, etc.