Causes and Control methods of rotten fruits of Green Pepper

In the process of planting green pepper in the greenhouse, rotten fruit will often affect the yield, resulting in a halving of output, bringing huge economic losses to growers, so how to prevent rotten fruit? What is the cause of rotten fruit of green pepper? Let's get to know it.

1. Rotten fruit caused by blight

The blight is a destructive disease of green pepper in the greenhouse. Once it occurs, it will spread to the entire greenhouse in a short time. Generally, it can cause plant death in 3-5 days. The yield reduction is more than 20%, 30%, and when it is serious, the disease can occur throughout the growth period. The disease is the most likely to occur after hanging the fruit.

Control methods: seeds and soil can be disinfected and sterilized to reduce pathogen invasion, or 25% 200 times liquid of metalaxyl wettable powder can be used to irrigate roots at the initial stage of the disease. when central diseased plants appear in the field, 0.3% copper sulfate can be used to irrigate the roots and seal the disease center. At the time of planting, after slow seedling and before flowering, Rui Manganese Copper, Ruidu Manganese Zinc and Metalaxyl were sprayed respectively, and attention should be paid to the alternate use of chemicals to prevent drug resistance.

2. Rotten fruit caused by Botrytis cinerea

Botrytis cinerea is caused by Botrytis cinerea fungal infection, which is more serious in low temperature and high humidity, poor ventilation, excessive planting density and poor plant disease resistance. the pathogen overwinters in the disease residue and soil and is transmitted by airflow, irrigation water and farming. Invade from wounds, aging or dead tissues. The disease can occur in both seedling stage and adult stage, and Hou Aeqin is characterized by irregular wheel-like gray mildew in the disease spot.

Prevention and control methods: to do a good job of ventilation and watering, watering should be carried out in the sunny morning, proper control of watering, remember garlic flooding, the initial stage of the disease can be sprayed with carbendazim and methyl carbendazim.

3. Rotten fruit caused by Sclerotinia sclerotiorum

Sclerotinia sclerotiorum is susceptible from seedling to adult stage, which mainly harms the base of stem, as well as stem, leaf and petiole, flower, fruit and fruit stalk. Bacteria multiply very fast in a warm and humid environment, with a temperature of 20-25 degrees and a humidity of more than 90%. It is the most suitable for infection, with an incubation period of 5-8 days.

Control methods: rotation with Gramineae crops for 3-5 years, pay attention to ventilation in the greenhouse to avoid high humidity, the disease can be prevented by carbendazim and trimethoprim or nonglidine spray.

4. Rotten fruit caused by anthrax

Anthracnose is mainly leaves and fruits, the fruits show water-stained yellow-brown round spots, often dense small black spots, leaves infected, initially water-stained chlorotic spots, and then become brown at the edge, light gray spots in the center.

Control methods: after entering the fruiting stage, chlorothalonil or methyl topiramate was sprayed to prevent and cure.

The above is the introduction of the causes and control methods of rotten green pepper. I hope it can help you. If you want to know more about it, please pay attention to us.