Tomato a large amount of fern leaf hormone poisoning?Or virus?

Recently, there are vegetable farmers that they have more than a dozen sheds in their local area, and all of them are planted with tomatoes. Although the price is guaranteed, these tomato varieties do not anti -virus. Many fern leaves appear in the shed, and their growth is greatly affected. Some people say that this is hormone poisoning. Some people say that this is a virus disease. How should I judge?

Hormone poisoning

Generally speaking, the tomatoes of the greenhouses have fern leaves, and most of them are caused by hormone poisoning, especially in areas with spraying flowers, dipping flowers, and dosage. It is caused by excessive hormones and continuous accumulation of plants. Under the same management and flowers at the same time, most of the hormone poisoning appears, the petiole is distorted, and the leaves are stiff. This is a typical symptom of hormone poisoning.

Fern virus disease

The fern leaves found by the growers are mostly distributed in the shed. Even if the leaves are fern, they are not stiff and brittle. If you look closely, you will find that there are yellow spots on the new leaves. Although the local tomato varieties are good, they are not antiviral varieties.

Based on the above situation, the local fern leaf should be caused by fern leaf virus (see Figure 1). In the future, this situation occurs again. Vegetable farmers can independently judge the cause of the onset according to the shed conditions and prevent it.

Symptom prevention plan

The fern leaf caused by hormone poisoning (see Figure 2) can be relieved by increasing the night temperature, increased fertilizer water, spraying sea alginic acid, and adjustment points to reduce the amount of medication. For virus disease, the winter stubble is mainly through the following means: First, the shed chamber is fully cleaned up to avoid remnants such as weeds and vegetables in the shed, and the sheds of the pharmaceuticals are performed to kill the aphids in the shed. Essence The second is to do a good job of changing the soil, multi -use biological bacteria, promote rooting, cultivate strong plants, and improve plant resistance. The third is to spray the agent early to improve the disease resistance. It can be combined with cantonosine, chitosin, chiloticin, zinc fertilizer, etc. to fully supplement nutrition and improve vegetable resistance.

- END -