In April, due to the rainy season, the pests such as wheat aphids and the spread of pests such as stripe rust were prevalent. The precipitation in the recurrence area of ​​the mildew in the middle and lower reaches of the Yangtze River and the Jianghuai wheat area was normal, and the epidemic should be noted. So the question is, what effective prevention measures should we take for this wheat pest? Next, please look at the treatment plan for the beginning of wheat pests and diseases brought about by Xiaonong.com, and I hope that it will help everyone.
First, wheat field red spider
1. There are two main types of red spiders in wheat fields: wheat long-legged spiders and wheat garden spiders, which basically appeared in March, especially in dry and rainy weather.
2. When the length of a single line has 200 insects, it should be prevented.
3. The best period of prevention and control is from April 1st to April 25th.
4, the prevention and treatment methods are: 20% cyanofol * Lego emulsifiable concentrate 1500-2000 times liquid +10. 2% Avi * triazophos 3000-5000 times liquid + nutrient solution at the same time spray control, if conditions permit, there are water pouring conditions The block can be combined with watering the wheat field to reduce its occurrence.
Second, wheat rust
1. There are three kinds of wheat rust, such as strip, leaf and stalk rust. The main cause is leaf rust, which usually begins in March.
2, treatment: when the field rust disease leaf rate reached 5%, with 12.5% ​​r- tebuconazole 2000 times liquid + nutrient or after flowering with 30% benz * propiconazole 3000 times liquid + nutrient spray treatment.
Third, wheat sheath blight
1. There are two peak incidences of wheat sheath blight: wheat before winter and rejuvenation.
2. The prevention and control of wheat sheath blight should be dominated by previous prevention and control. The rejuvenation and jointing stage is an important period of prevention and control, and the control effect is poor after the jointing stage.
3, the prevention and treatment method is: with 12.5% ​​r- tebuconazole 2000 times liquid + nutrient spray, mainly based on wheat stem base.
Fourth, wheat powdery mildew
1. Hazard: It mainly harms the leaves. In severe cases, it can also damage the sheath, stem and ear.
2. When the diseased leaf rate reaches 10%, it should be timely prevented
3, prevention time: irrigated land, planting earlier, denser plots in the middle and late April, the general plot in early May.
4, prevention and treatment methods: with 12.5% ​​r- tebuconazole 2000 times liquid + nutrient or after flowering with 30% bene * propiconazole 3000 times liquid + nutrient spray control.
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