Wheat pests and weeds
In 2014, it is expected that the overall incidence of wheat pests and weeds in Beijing will be moderate, with an area of ​​about 1.4 million mu. Wheat pupa is generally biased and the midge pollinates tend to occur. In some areas, the damage to grass weeds is increasing, and the prevention and control situation is more severe. It is necessary to focus on the practicality of wheat seedlings, diseases, pests and diseases this year, highlight key diseases and pests and key technologies, and vigorously promote professional and unified prevention and green prevention and control of pests and diseases. The specific measures are as follows:
Spring wheat field weed control and disease control
In the process of wheat returning to the jointing stage, comprehensive prevention and control techniques for weed control, disease prevention and control were promoted, weeds in wheat fields were controlled, powdery mildew was prevented, and growth of vigorous seedlings was controlled to prevent late lodging. Pharmaceutics can be used as follows: 75% tribenuron-ethyl sulfate suspension concentrate 1g + 20% Triadimefon EC 50ml; or 72% 2,4-D Butyl Ester EC 50ml + 20% Triadimefon EC 50ml, Spray 30 to 50 kg of water evenly. For the ground where wheat is growing too busy and has a dangerous surface, add 15% paclobutrazol WP to the above formula to control the sprout growth and prevent lodging.
Conduct timely prevention and control of major pests and diseases
In the returning green period of wheat, the land with high density of soil pests (≥3 heads per square meter) shall be combined with returning clean water and toxic soil to prevent and control; the jointing stage of wheat shall be used for plots with high density of midge (≥15 pieces per sample). Chlorpyrifos, phoxim and other insecticides were mixed with sandy soil, the poisonous soil was used for flood control, and when the heading date was longer than 10 adult nets, spray prevention was carried out in a timely manner; wheat booting stage was more sensitive to powdery mildew varieties or density Large fields of wheat or diseased leaves with rates above 10% are sprayed with fungicides such as triadimefon and imidamide to prevent and control; in the case of heading and flowering of wheat, in case of rainy weather, spraying of carbendazim and carbendazim carbendazim in time Such as fungicides to prevent head blight; wheat heading grain filling period, when the amount of more than 100 strains of maggots, the timely selection of anti-Kong Wei, imidacloprid, beta cypermethrin and other pesticides spray control of wheat stubble.
In the middle and late period of wheat, “one spray and three defensesâ€
In the wheat heading to grain filling stage, the “one-spray and three-prevention†technology is promoted to prevent and control wheat aphids, midgeworms and powdery mildew, and to prevent premature aging and lodging of wheat. The pharmaceutical formulation is: 20% triazolidone EC 50 ml + 10% imidacloprid wettable powder 30 g + 4.5% beta-cypermethrin EC 40 ml + 99% potassium dihydrogen phosphate 40 g, 30 kg of water evenly sprayed. In the re-emergence area of ​​midge, it is necessary to make full use of the effective period of pesticides, and to advance the prevention and treatment time appropriately, and to use drugs at the main peak of adult insects.
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