Urgently in the "mildew" ciliary, pay close attention to prevention of gray mold
The recent continuous cloudy and rainy weather is very unfavorable to the release of moisture from greenhouses, resulting in excessively high indoor air humidity, low temperature, high humidity, and low sunshine, which can easily lead to the occurrence of gray mold. Wei Yonglin, regional technical manager of Shaanxi Saizhong Biotechnology Co., Ltd., said that gray mold is common in tomatoes, peppers, eggplants, cucumbers, and other fruit vegetables. The average incidence in greenhouses is 30% to 50%, and some greenhouses are gray. The incidence of mycoticosis exceeds 80%.
Botrytis cinerea is a very harmful disease in northern China's vegetable gardens. Tomatoes, peppers, cucumbers, beans, and other vegetables cultivated in protective facilities such as plastic greenhouses, greenhouses, and small sheds often suffer from gray mold. In severe cases, the yield is reduced to 20 %~30% or more.
For example, tomato tomatoes are a very difficult disease to control in tomatoes in greenhouses. Once infected, the entire greenhouse will be killed and killed. Even if pesticides are sprayed, the effect will be poor. Not only time-consuming and costly, the cost rises, but also affects the quality and residual drug damage. According to Wei Yonglin, the most important measure for preventing and controlling tomato gray mold is to do a good job in the ventilation, light transmission, and dehumidification conditions in the shed, but at the same time keep the temperature not too low. Secondly, it is necessary to strengthen fertilizer and water management so that the plants grow vigorously and prevent premature aging and wounds caused by various factors. The diseased plants and diseased fruits should be cleared and destroyed in time. After the harvest, the gardens can be completely cleared and the soil can be sun dried. This can reduce the source of germs. You can also choose 50% fast-inking wettable powder 1500~2000 times, 40% polysulfide suspension 400 times, 50% acetaminophen wettable powder 1000~1500 times, or 70% thiophanate-methyl 800~ 1000 times liquid. Spray once every 7~10 days, spray 3~4 times continuously. It should be noted that pathogens are prone to drug resistance, and therefore the same agent cannot be used for a long period of time, and the above agents should be used interchangeably.
"螨 门" copy the door, comprehensive control of locusts
It was fine and rainy, and greenhouse vegetables entered the critical period of locust control. The locusts are small in size and fast in reproduction. Some varieties will have a phenomenon of pulling nets in the later period, and it is difficult to control them when they break out. Therefore, they must be promptly prevented.
The common locusts are mainly divided into three categories: Tea tree pods, Tetranychus urticae and Forsythia root. Tea scutellariae mainly harmed the young plant parts, and the two-spotted spider mites mainly harmed the middle leaves. When the puny roots were severe, the growth of vegetables was stagnant and the plants died.
Select the best medication for the period of prevention and treatment as far as possible in the early stage of aphids, population density, the number of spraying when less, in order to increase the effective time of acaricides, reduce the number of uses.
Spraying should be thorough and thorough with attention to spray techniques. When spraying, uniform spraying should be performed. Special attention should be paid to the densely populated eggs on both sides of the main vein on the back of the leaves. When spraying, spray until the crop is wet until it drips. Most of the acaricides do not possess systemic absorption. Silicone and mineral oils can be added during the fight to increase the extension, extension and permeability of the liquid.
Spray time interval should be short. Once pests occur, spray every 3~5 days and spray 3 times. It should be noted that in the coexistence of aphids, cockroaches, and cockroaches, acaricides that are effective against all cockroaches should be selected. The azole oxime ester, bufalin, avermectin and other agents can be used. They should be used in rotation to achieve the purpose of controlling the locusts.
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The spring greenhouse is the main breeding ground for Bemisia tabaci throughout the year. The recent warming up of temperature is beneficial to the proliferation of Begonia tabaci. If the vegetable farmer neglects, the amount of insects will rise quickly, resulting in a passive situation in control. Therefore, effective measures must be taken to implement early prevention and early management measures.
After the larvae were completely cleaned and exterminated, the worms were ploughed on the soil. After the soil was ploughed, the acres were repelled with 80% dichlorvos (300 milliliters) to kill the remaining adults in the shed (melon seedlings to avoid dichlorvos fumigation).
Full implementation of yellow board trapping and killing of adult eggplant vegetables, especially pepper fields, should be vigorously promoted after the yellow sticky kill adult, control population growth, mu 16~18, the height of the suspension and the plant apex the same level, and adjust the height with growth .
It was found that early adult insecticides were detected in the shed before flowering. Adults were found to have lived in insecticides for more than 12 hours with 10% smoked locust and more than 12 hours in the mu, and 52.25% for the farmland and 50 ml plus 5% the next day. Dimethoate 40 ml, 70% Miracle 5 kg watered 50 kg spray control, so that "a smoked a spray", the insect population density is always controlled at the low level of 100 adults.
Control of continuous use of eggs at high doses When the adult dose rises sharply, use 15% gold for a good 50 ml plus 0.5% Jia Wei 35 ml plus 20% recovery 50 ml spray control every 4 to 5 days once for 2 to 3 consecutive times . The harvest period was changed to 0.5% matrine or 1.1% green wave 75ml plus 70% Irvine 5g spray. After harvesting, the pest was promptly exterminated and the insect source eliminated.
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