Botrytis is an important disease of eggplant, which generally reduces production by 20% to 30%, and by weight to 50%. Its suitable season is generally small in the indoor and outdoor temperature difference at night, and the amount of watering is large.
Hazard symptoms Mainly harm flowers, fruits, leaves, pathogens invade from the residual parts of eggplant, and then harm the young fruit, causing decay in the leaves of the fruit, and producing gray mold layer. The leaves are infected with brown necrotic spots with a diameter of 1 - 1.5 cm.
The law of the disease The pathogens overwinter with the pathogenesis of the disease, and spread by airflow and farming operations. The suitable conditions are temperature 18-20 ° C, air relative humidity above 90%. Even in the rainy weather, when the light is weak, if the wind is not released in time, it is easy to induce the disease.
Control method:
(1) Strengthen management, often wipe the shed film, enhance the light in the shed to avoid watering in the rainy days, watering should choose sunny morning, at the same time, the closed shed, when the temperature is increased to 30 °C, then the air is discharged. During the daytime, the air release time should be extended as much as possible to prevent excessive humidity and condensation on the foliage. When the outdoor minimum temperature is above 8 °C, do not close the tuyere at night. When the humidity is particularly high, the front air vent should be opened to enhance the drainage. Even the rainy weather must adhere to the right amount of wind.
(2) Remove the residue of the diseased plant. Timely removal of diseased leaves, diseased flowers, and diseased fruits. In order to prevent the spread of the conidia of the pathogens, the leaves, flowers and fruits of the disease can be picked up by plastic bags, and taken out for deep burial to prevent re-infection. Timely remove the corolla whose vitality is weak, defeated and still remain on the fruit, to prevent the infection of the bacteria.
(3) Drug control. Suitable drugs are 50% Succulent WP 1000-1500 times, and the aerosol of the corresponding variety of drugs. In order to enhance the control effect, different medicines should be applied in rotation, spray and smoked at the same time, spray once every 3 to 5 days, spray during the day, and use aerosol at night. In addition, adding appropriate amount of drug spray to the fruit-preserving hormone can improve the control effect. (Yanggu County Agricultural Bureau Experimental Station 252300 Lu Lanhua)
Source: Agricultural knowledge
Botrytis is an important disease of eggplant, which generally reduces production by 20% to 30%, and by weight to 50%. Its suitable season is generally small in the indoor and outdoor temperature difference at night, and the amount of watering is large.
Hazard symptoms Mainly harm flowers, fruits, leaves, pathogens invade from the residual parts of eggplant, and then harm the young fruit, causing decay in the leaves of the fruit, and producing gray mold layer. The leaves are infected with brown necrotic spots with a diameter of 1 - 1.5 cm.
The law of the disease The pathogens overwinter with the pathogenesis of the disease, and spread by airflow and farming operations. The suitable conditions are temperature 18-20 ° C, air relative humidity above 90%. Even in the rainy weather, when the light is weak, if the wind is not released in time, it is easy to induce the disease.
Control method:
(1) Strengthen management, often wipe the shed film, enhance the light in the shed to avoid watering in the rainy days, watering should choose sunny morning, at the same time, the closed shed, when the temperature is increased to 30 °C, then the air is discharged. During the daytime, the air release time should be extended as much as possible to prevent excessive humidity and condensation on the foliage. When the outdoor minimum temperature is above 8 °C, do not close the tuyere at night. When the humidity is particularly high, the front air vent should be opened to enhance the drainage. Even the rainy weather must adhere to the right amount of wind.
(2) Remove the residue of the diseased plant. Timely removal of diseased leaves, diseased flowers, and diseased fruits. In order to prevent the spread of the conidia of the pathogens, the leaves, flowers and fruits of the disease can be picked up by plastic bags, and taken out for deep burial to prevent re-infection. Timely remove the corolla whose vitality is weak, defeated and still remain on the fruit, to prevent the infection of the bacteria.
(3) Drug control. Suitable drugs are 50% Succulent WP 1000-1500 times, and the aerosol of the corresponding variety of drugs. In order to enhance the control effect, different medicines should be applied in rotation, spray and smoked at the same time, spray once every 3 to 5 days, spray during the day, and use aerosol at night. In addition, adding appropriate amount of drug spray to the fruit-preserving hormone can improve the control effect.
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