Autumn tomato rotten fruit prevention method

In autumn, tomato is prone to rotten fruit. The following are measures against rotten fruit caused by cotton rot, soft rot, anthracnose and fusarium fruit rot:
First, the rotten fruit caused by cotton rot. Cotton rot is also called brown spoilage, mainly affecting immature fruits. First, there is a pale brown spot on the top of the fruit or the shoulder of the fruit. Sometimes there is a small amount of white mold, and then gradually form a concentric striate spot, which gradually turns into a dark brown color. The subcutaneous flesh also becomes brown, and the whole fruit rots and falls off later.

Control measures: timely remove the diseased fruit, bring out the field treatment; pay attention to pruning, improve the ventilation and light transmission conditions in the field; in the early stage of the disease, timely spray 25% toxic mycelium 800-1000 times liquid, 75% chlorothalonil 600-800 times liquid Or 70% mancozeb 400-600 times liquid, spray once every 7 to 10 days, even spray 3 to 4 times.

Second, the rotten fruit caused by soft rot. Soft rot occurs mostly on the green fruit. The skin of the disease remains intact, but the internal flesh decays rapidly, and it has a foul smell and is easy to fall off; it forms a white stiff fruit after drying.

Control measures: early pruning, snoring, avoiding rainy weather or pruning before dew; do not prevent pests in time, reduce insect damage; use 150-200ppm agricultural streptomycin solution or 70% enemy in time before or during the onset of the disease Pine 1000 times liquid spray control.

Third, the rotten fruit caused by anthrax. The anthracnose mainly infringes the immature fruit, and the diseased part is watery and transparent. It is brown, slightly concave, and has a concentric pattern. It has dense black spots on it and secretes reddish sticky. Rotting or falling off.

Control measures: timely harvest fruit, timely removal of diseased fruit; before or at the onset of the disease, timely use 70% mancozeb 400-600 times solution, 75% chlorothalonil 600-800 times solution, 50% carbendazim 800 times liquid or 80% anthrax Fami 800 times liquid spray control.

Fourth, the rotten fruit caused by Fusarium fruit rot. Fusarium fruit rot is mainly harmful to mature fruit. The diseased part is light-colored at first, and then turns brown. It has no obvious edge. It spreads throughout the whole fruit. When the humidity is high, the diseased part is densely reddish cotton-like mycelium, causing fruit to rot. .

Control measures: timely remove the diseased fruit and concentrate treatment; prevent the fruit from coming into contact with the ground; spray 50% DT500 times solution or 36% thiophanate-methyl suspension 500 times before fruit coloring.