What causes the new leaves to shrink and curl?

Recently, many crops have withered new leaves, and many vegetable farmers don't know the specific reasons. Some people say it is the harm of thrips and mites, while others say it is a virus.

In fact, there are three main reasons for the atrophy of new leaves in vegetables: one is mites, the other is viral diseases, and the third is hormone poisoning.

The symptoms of these three diseases are very similar, and they are all the most serious in the high temperature period, so they often lead to misdiagnosis and misjudgment. Adult mites and young mites gather on the back of tender leaves, stems, buds and young fruits of vegetables to suck juice, causing plant damage.

The damage of new leaves is characterized by atrophy of the top leaf and hardening and embrittlement of the leaves. The naked eye observation shows that there are many small protrusions on the front of the damaged leaves, and the back of the damaged leaves is grayish brown or yellowish brown with oily luster, which is the key to distinguish it from the damaged plants.