Garlic leaf blight is likely

Starting with white spots

High humidity, spread with the wind

You can use the following agents to prevent and control:70% Dyson Manganese Zinc Wettable Powder 500 times liquid, or 50% putrescine Wettable Powder 1,500 times liquid, or 50% isobutyl urea Wettable Powder 1,000 times liquid.

Is it?

If the leaf disease at the same time, there is the phenomenon of distortion, you can consider the virus disease

Leaf spot, gray spot, purple spot and other diseases these agents are basically can, only the virus disease they can not control

Virus disease is also a small white spots, but accompanied by the symptoms of distortion of the leaves

Then you directly with the Chunleiomycin, or thiazolyl zinc, thiabendazole and other agents to control

Diseases from the big picture, but three, fungi, bacteria, viruses

If these drugs do not work, can only be suspected of physiological problems

For example, nitrogen fertilizer, leaf tender, the northwest wind, the leaves are prone to injury symptoms

is a little strange

How do you use your fertilizer?

It looks like it's not your own family's problem

Challenging to figure out

What about the base fertilizer?

You're from Yuxi, Yunnan

Fungal disease chems, these agents must be effective

Thinking about deficiencies due to heavy cropping?

Calcium, magnesium and sulfur?

Sulfur in particular?