Control methods of Botrytis cinerea in Pepper

Botrytis cinerea is one of the most common diseases in the process of growing chili peppers. Its onset period is between December and May of the following year. The pathogen prefers the environment with low temperature and high humidity, so it is easy to occur in rainy days in winter and spring. In severe cases, it can lead to plant death. The following pro-agricultural network to introduce to you about the prevention and control of pepper gray mold.

Before introducing the prevention and control methods, the pro-agricultural network would like to introduce to you the symptoms of Botrytis cinerea in pepper, so as to facilitate people to have a basic understanding of this disease, although for many old growers, this disease has long been common. But I'd like to introduce it here.

I. harmful symptoms of Botrytis cinerea

The leaves, stems and terminal buds are damaged at the seedling stage, the first cotyledon turns yellow, then extends to the young stem, constricts and becomes thin, and often collapses and dies from the disease. The adult stage is harmful to leaves, flowers and fruits. Most of the damage to the leaves began from the leaf tip, initially formed a yellowish brown spot, and gradually expanded upward into a "V"-shaped spot. The disease of the stem produced waterlogged disease spot, and died above the disease part. The flower organ suffers and the petals wither. When the fruit is damaged, it starts from the adhesion between the young fruit and the petals, showing a waterlogged disease spot, which causes the whole fruit brown spot after expansion. The boundary between disease and health is obvious, and there is a grayish-brown mildew layer in the disease.

These are the symptoms of Botrytis cinerea, and then there are the prevention and control measures that we are more concerned about. in fact, the pro-agriculture network introduced at the beginning that this kind of pathogen likes the environment with low temperature and high humidity. then the most environmentally friendly approach must be not to create a good growth environment for Botrytis cinerea. Let's take a look at it.

II. Control methods of Botrytis cinerea in pepper

1. Strengthen ventilation in greenhouses and greenhouses. Watering should be carried out on a sunny morning, and the amount of water should be controlled, not too much. Timely elimination of stagnant water after rain, reasonable ventilation and cooling in the shed

two。 Remove the source of bacteria. Remove the diseased fruit in time and bury it deep outside the greenhouse and greenhouse. After harvest, thoroughly deal with diseased plants, etc., turn deeply, and turn the remaining diseased leaves and branches into the deep layer. Plastic film mulching cultivation can reduce the occurrence of Botrytis cinerea

3. Chemical control. Plant disease in the protected field can be fumigated with 15% tofu fumigant 250-300 g / mu, once every 5-7 days, continuous or alternately 2-3 times. You can also use 1000-1500 times of Luheng 70% pyrimethamine water dispersible granules, 700-1500 times of Luheng 30% pyridamyramine suspension or 600 times of clove parsley phenol. combined with Luheng 6 (50% chlorobromoisocyanuric acid soluble powder) or Luheng copper master (86.2% cuprous oxide) 1500 times spray can enhance the control effect on Botrytis cinerea and prevent various complications at the same time. It also has a special effect on bacterial diseases, spraying once every 7-10 days, and spraying 2-3 times continuously according to the condition.

The above is the introduction of the prevention and control methods and drugs of pepper gray mold by pro-agricultural network. The prevention and control of the disease is also one of the key factors affecting the yield benefit of pepper planting. I hope you can get something after reading this article. it can play a certain reference role in the prevention and control of pepper gray mold.