Symptoms and Control of Botrytis cinerea

Water chestnut, also known as horseshoe, Tianzhi, etc., belongs to the genus Capsella of Cyperaceae, tufted aquatic herbs. In recent years, Zhangzhou City has vigorously promoted the rice-water chestnut-vegetable rotation cultivation model and achieved good benefits. Its underground stem is globular, the skin is reddish brown, the flesh is white, the crisp sweet juice is refreshing, it can be eaten fresh, and it can also process fruit juice, which is favored by consumers. It is a promising agricultural vegetable variety for earning foreign exchange.

Main varieties of water chestnut

1) Guilin horseshoe local varieties in Guilin, Guangxi. The height of the plant is 100ml / 120cm, and the degree of development is 20cm. The bulb is oblate, 2.4 cm high, 4 cm in horizontal diameter, the terminal bud is stout, and the two lateral buds often stand side by side, so it is known as "three masts". The skin is reddish brown, the flesh is white, and each weighs 30 grams. Mainly fresh food, but also cooked food and processing, high sugar content, crisp meat, excellent quality. Vigorous and strong anti-lodging ability. From June to July, the seedlings were raised with bulbs, the seedling stage was 25 days, the growing period was 130 MUE 140 days, and the yield per mu was 1500 Mu 2000 kg.

2) Guangdong local varieties of water horseshoe. The height of the plant is 70ml 90cm, and the degree of development is 15ml 20cm. The corm is oblate, 2 cm high, 2.5 cm in transverse diameter, the terminal bud is longer, the skin is dark brown, and the flesh is white. Each weighs 10 grams. The content of starch is high, mainly cooked food and starch. Vigorous growth, strong stress resistance, moisture resistance, not resistant to storage. From June to July, the seedlings were raised with bulbs, the seedling stage was 25 days, the growing period was 130ml / 140 days, and the yield per mu was 1500 kg.

3) Cardamine is native to the Philippines. The plant height is 110m2 / 120cm. The bulb is large, oval, transverse diameter 4cm, vertical diameter 2.6cm, single weight 25g, crisp taste sweet, good quality, mainly fresh food, yield more than 2000 kg per mu.

4) Xiaogan Cardamine local varieties in Xiaogan City, Hubei Province. The plant height is 90ml and 110cm. The bulb is flat and round, bright red, with an average weight of 22 grams, thin skin, sweet taste, less fine residue, mainly fresh food and good quality. The yield per mu is 1000 Mu 1500 kg.

5) local varieties of Cardamine in Suzhou City, Jiangsu Province. The plant height is 100ml / 110cm. The bulb is oblate, the tip of the bud is apical, the navel is flat, the skin is thin, the flesh is white, and the weight is about 15 grams. It is suitable for canning. The yield per mu is 750 won 1000 kg.

6) the local variety of Cardamine Yuhang in Hangzhou City, Zhejiang Province, the bulb is flat and round, the terminal bud is thick and straight, the navel is flat, the skin is brownish red, the skin is thin, the taste is sweet, and the single weight is about 20 grams. It is suitable for processing canned food and fresh food, with a yield of 1000 Mu and 1200 kg per mu.

Symptoms and control of water chestnut corm Botrytis cinerea

Symptoms of water chestnut corm Botrytis cinerea:

Botrytis cinerea of water chestnut bulb mainly occurred on the corm of water chestnut during harvest and storage, and the mouse gray mildew layer (conidiophores and conidia) was produced in the wound, and the inside of the damaged corm was dark brown and soft rot, which was unedible.

The transmission route and incidence regularity of water chestnut corm Botrytis cinerea:

The disease is caused by Botrytis cinerea, a subphylum fungus. The pathogen overwintered with hyphae or conidia on the corm and remnant of water chestnut, and the conidia spread through the air and invaded from the wound. During the storage period, the incidence of high humidity was serious.

Control methods of Botrytis cinerea of water chestnut corm

1) seed Cardamine disinfection: select the disease-free species of Cardamine, use 25% carbendazim wettable powder 250 times solution, or 50% methyl thiophanate wettable powder 800 times solution, soak the seed Cardamine for 18 hours, and then sow the seeds.

2) Pesticide control: in the early stage of the disease in the field, timely drug control. You can use 2000 times of 50% propofol wettable powder or 1000 to 1500 times of 50% prohydantoin wettable powder plus 1000 times of methyl topiramate wettable powder, or more than 40%? Sulfur suspending agent 700mm 800 times liquid spray. Spray once every 7-10 days, spray 2-3 times in a row, in case of rainy days, make up spray in time. During the storage period, the bulbs can be sprayed with 45% Tekedo suspension 3000 times, combined with cold storage, the disease prevention effect is better.