Powdery mildew mainly harms leaves, petioles and stems. There are two common symptoms: first, radial powder is produced on the leaves of tomato plants, and white powder appears on the leaves recently, so a plan is issued when seeking medical treatment. This situation is not powdery mildew or other diseases, but phytotoxicity, which is caused by uneven dilution when spraying pesticides and produces symptoms similar to eggplant leaf mold, so it is often misdiagnosed as tomato leaf mold, which is caused by pepper powdery mildew after our detection. Tomato powdery mildew can be induced by tomato powdery mildew and pepper powdery mildew.

Two common manifestations of persimmon powdery mildew are white powder and dry leaves. The disease mainly harms leaves, petioles, stems and fruits, and can also be fatal. Powdery mildew is very common in tomatoes and most vegetable farmers are familiar with it. This is a disease that seriously harms tomato production. Powdery mildew mainly affects the leaves, petioles and fruits of tomato plants. The disease occurs on leaves, petioles, stems and fruits. The white powder on the surface is pathogen mycelium, conidiophore and conidia seeds.

Silt layer began to be sparse, and gradually thickened in the later period. Yellow-green powdery mildew on the leading edge is a common tomato disease, which mainly harms the leaves, petioles and fruits of tomato plants. March-June or June10-June 1 1 are more common in greenhouses, and are generally covered in fields, causing serious diseases. Radial pink dots, namely hyphae, conidia and conidia, began to appear on the front of leaves, and then expanded. These spots are not pigments, but a kind of insect called whitefly, also called white moth, which is one of the most common tomato pests.

So how to control tomato whitefly? Farmers often show hissing frost on tomato leaves, which is definitely a late blight. It is a fungal disease, which is caused by drinking water in the open air (watering, raining, spitting, taking medicine water). It belongs to the same pathogen as cucumber downy mildew, and benzoyl and chlorhexidine can be used. Damage occurs on leaves, petioles, stems and fruits. At the beginning of the disease, green spots appeared on the leaves. Later, it expanded into an irregular focus with white powder on the surface, which is the mycelium, conidia and conidia of pathogenic bacteria.