With the acceleration of the adjustment of agricultural structure, high-quality wheat production has developed rapidly, but pests and diseases have always been one of the important factors restricting the increase of wheat yield and quality. In order to effectively prevent and control the occurrence and spread of high-quality wheat pests and diseases in spring, improve the quality of wheat. Commodity, to achieve high quality, high yield and high efficiency, increase farmers' income, the main prevention and control techniques for high quality wheat in spring are briefly described as follows:
First, return to the blue and joint period. The focus of prevention and control during the rejuvenation period is wheat sheath blight, midge, and red spider. Sheath blight is one of the main diseases in the production of high-quality wheat. It should be done sooner or later, usually in the first half of March, and sprayed once every 10 to 15 days. 667 square meters (1 mu) with 20% jinggangmycin wettable powder 40 g or 20% dried net wettable powder 40 g or 12.5% ​​corrugally wettable powder 20 g or 20% triazolone EC 40 ~ 50 grams of water plus 40 to 50 kilograms, sprayed at the base of wheat, can cure wheat powdery mildew, rust and other diseases. In recent years, the larvae have been relatively heavy, generally 3 to 5 heads per small square (10 cm × 10 cm × 20 cm), and the high ones have more than 90 heads, resulting in reduced or basically no harvest of wheat. It is necessary to seize the favorable opportunity when the wheat seedlings are small and easy to operate. When the larvae of the larvae rise to the surface activity, the 667 square meters use 40% methyl isoflavone emulsifiable concentrate 150-200 ml or 50% phoxim emulsifiable concentrate 200. ML to the right amount of water, mix 25 kg of fine soil to make toxic soil, evenly spread the stalks, then shallowly simmer, turn the soil into the soil and then water; or 667 square meters with 3% methyl isoflavone granules 2 kilograms of fine soil and 20 kilograms of fine soil are evenly spread on the surface, and then shallowly raked into the soil, and can also treat the golden insects, mites, mites and other pests. When investigating some of the red spiders in the wheat field to meet the control standards, 667 square meters were treated with 1.8% worm emulsifiable concentrate 6-8 ml or green hen kill 20 ml plus water 40-50 kg spray.
Second, the booting stage of the booting. During this period, we focused on the control of larvae and red spiders, and monitored pests such as powdery mildew, stripe rust, and scab. Before the wheat enters the heading and flowering, it is the key period for the wheat to be unearthed by the insects (before April 25). 50% phoxim emulsion 50 ml or 40% omethoate 40 ml per 667 square meters plus 40-50 kg of water. Spray control in a timely manner. If the wheat begins to bloom, the larvae have been drilled into the wheat husks and start to suck the pulp, then the spray control will not help.
When the red spider or the long-leg red spider in the wheat field reaches a single row of 0.33 meters and 200 or 100 heads respectively, it is necessary to prevent and control. 667 square meters with 1.8% insect gram EC 6-8 ml water 40-50 kg spray control effect is remarkable It can also cure the ear mites. Powdery mildew, rust and other epidemic diseases must be investigated regularly. When the prevention and control indicators are reached, timely prevention and control should be carried out to prevent their widespread use. For 667 square meters, 12.5% ​​of Heguoli WP can be used for 20 grams or 15% of rust. Wettable powder 75 ~ 100 grams of water plus 50 kg evenly spray, spray again after 7 ~ 10 days, the control effect is very good. From the beginning of the wheat to the beginning of flowering period, if the weather forecast has more than 2 to 3 days of rainfall, immediately 667 square meters with 50% carbendazim emulsion 100 ml or 70% methyl thiophanate WP 100 g plus 50 kg spray. It can effectively prevent the occurrence of scab.
Third, the filling period. The grain filling stage of wheat is the peak period of various diseases, and it is also a key period for controlling pests and diseases and capturing high yield and quality of wheat. The focus of this phase of prevention and control is wheat ear, powdery mildew, rust and so on. 667 square meters with 10% oxazoline wettable powder 20 grams or 25% fast killing emulsifiable concentrate 25 ~ 35 ml plus water 40 ~ 50 kg spray, can effectively control wheat ears. The method for controlling powdery mildew and rust is the same as above, and it can simultaneously treat wheat leaf blight. If the ratio of natural enemies to mites in the field is greater than 1:120, it is no longer necessary to use insecticides for controlling mites.
For the control of pests and diseases of dominant wheat, according to the different characteristics of different varieties of wheat, on the basis of doing a good job of measuring the pests and diseases, according to the prevention and control indicators, targeted prevention and control.
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