Wealthy bamboo gray mold disease
The editor will explain the knowledge of green plants and flowers about the gray mold disease of wealthy bamboo, let's follow the editor to see the specific content!
[Symptoms]
This disease mainly infects the leaves of golden edge wealthy bamboo. After the plant is infected, irregular shaped water-stained lesions appear from the leaf tip and leaf margin. The lesions expand rapidly in humid conditions, becoming grayish-brown, with a gray mold layer on the affected area. In severe cases, most plants die.
[Incidence Regularity]
The pathogen is Botrytis cinerea. The disease is severe under low temperature and high humidity.
[Prevention and Control Methods]
① Control the temperature and humidity of greenhouses
Usually adopt the method of late ventilation in the morning and early closure of the greenhouse in the afternoon, start ventilating when the greenhouse temperature exceeds 33°C, and close the greenhouse when the temperature drops to 20°C, to ensure that the night temperature is between 15-17°C or higher.
② Apply sufficient base fertilizer, properly apply phosphorus and potassium fertilizers to enhance the disease resistance of the plant.
③ Control the amount and frequency of watering, achieving multiple small amounts
Watering should be done in the early morning on sunny days, and ventilation should be carried out immediately after watering to remove moisture. After the disease occurs, control watering and, if necessary, apply water around the rootstock.
④ Timely remove diseased leaves and incinerate them.
⑤ Conduct chemical control
In the early stage of the disease, various application methods can be used for prevention and control. To avoid the development of fungicide resistance, fungicides can be rotated or mixed. For spray control, you can choose 50% Speedkleen wettable powder at a concentration of 2000 times, or 50% Pomaline wettable powder at a concentration of 1500 times, or 70% Methylthiophanate wettable powder at a concentration of 1000 times, or 50% Carbendazim wettable powder at a concentration of 500 times, or 60% Fungicide Micronized powder at a concentration of 600 times, or 45% Thiram suspension at a concentration of 4000 times, or 2% Wuyiycin aqueous solution at a concentration of 150 times, etc. Mixed spraying can be done by adding 65% Fungicide wettable powder at a concentration of 1500 times to 50% Pomaline 2000 times, or adding 50% Methylthiophanate wettable powder at a concentration of 1000 times, for fumigation control, 45% Chlorothalonil smoke bombs or 10% Speedkleen smoke bombs can be used, applying 250 grams per 667 square meters, ignite in several places in the evening, close the greenhouse, and it will be fine overnight. Those with conditions can also try 3% Thiram smoke bombs. For dust control, 5% Chlorothalonil complex dusting agent or 10% Meik clear complex dusting agent can be used, applying 1 kilogram per 667 square meters, dust with a duster in the evening, then close the greenhouse overnight.
The above () introduces the specific introduction of the gray mold disease of wealthy bamboo, hoping to bring some flower knowledge to flower enthusiasts.