Comprehensive control of Botrytis cinerea in zucchini

Zucchini, a kind of pumpkin, is grown in Shandong, Shanxi, Henan, Hebei and other places. Alias eggplant melon, bear (male) melon, white melon, melon, papaya, horn melon, Xungua and so on. It is native to India and has been planted in the south and north of China. Zucchini has the effects of clearing heat and diuresis, eliminating annoyance and relieving thirst, moistening the lungs and relieving cough, reducing swelling and dispersing knots and so on.

The optimum temperature for the growth habit of zucchini was 20 ℃ and 25 ℃. The growth was slow below 15 ℃ and stopped below 8 ℃. Over 30 ℃, the growth is slow and diseases are very easy to occur. The suitable temperature for seed germination is 25 ℃ 30 ℃, 13 ℃ can germinate, but it is very slow, and 30 ℃ is the fastest, but it is easy to cause overgrowth. The flowering and fruiting period needs a higher temperature, and it is generally best to keep 22 ℃ 25 min. Early-maturing varieties have stronger tolerance to low temperature. The lowest temperature for root growth was 6 ℃, and the lowest temperature for root hair formation was 12 ℃. The fertilized fruit can develop normally when the night temperature is 8 Mel 10 ℃. The light intensity is moderate and can withstand weak light, but it is easy to grow when the light is insufficient. The photoperiod belongs to short-day plants, which is beneficial to the growth of stems and leaves under long-day conditions, and the melon-bearing period is earlier under short-day conditions. Zucchini likes to be moist and is not resistant to drought, especially in the melon-bearing period, the soil should be kept moist in order to obtain high yield. Virus diseases are easy to occur under the condition of high temperature and drought, but high temperature and high humidity are also easy to cause powdery mildew. The requirement of soil is not strict, sand, loam and clay can be cultivated, and the loam with deep soil layer is easy to get high yield. Zucchini gray mold is one of the main diseases of zucchini, which seriously affects the yield of zucchini, so how to carry out comprehensive control of zucchini gray mold? In recent years, the area of zucchini cultivated in solar greenhouse is larger, and the occurrence of zucchini gray mold often causes tender melon rot, which affects the yield and benefit. Therefore, measures should be taken to carry out comprehensive prevention and control.

1. Grafting to prevent disease. Grafting with Yunnan black seed pumpkin as rootstock and zucchini as scion can increase the resistance of zucchini to Botrytis cinerea.

two。 Hanging vine cultivation. When the zucchini grows to eight leaves, hang the vine, connect a wire above each row of plants in the north-south direction, according to the position of each zucchini, tie a nylon rope perpendicular to the root of the zucchini, and then tie the end of the rope to the root of the zucchini so that the rope and the stem are intertwined with each other.

3. The potion kills the flower. After zucchini blossoms, 0.1% trimethoprim is added to zucchini every morning, which can effectively control the botrytis cinerea of zucchini.

4. Chemical control. It can be sprayed with 50% Sukeling wettable powder 1500 times, or 50% promethrin wettable powder 1000 times 1500 times, 70% Dysen zinc wettable powder 400 times, or 50% carbendazim wettable powder 500 times, once every 6 to 7 days, continuously spraying 2 times, 45 kilograms per mu.

5. Strengthen field management. Clean up the sick and disabled bodies, keep the field hygienic, prevent the spread of germs and control the temperature. Subsurface irrigation or drip irrigation is used for watering, and the humidity at night should be less than 80%. When the humidity is high, measures should be taken to reduce the humidity. In the later stage of production, it is necessary to clean up the old leaves in time, increase ventilation and light transmission, make the plant grow healthily and increase the ability of disease resistance.