Under normal circumstances, about 15 days after wheat is sown, the wheat seedlings are basically grown. Therefore, how to manage the wheat seedlings is critical in the future. I recommend several methods for preventing and controlling wheat seedling diseases and pests for the reference of farmers. .
Wheat rust disease 15 to 20 days after the emergence of wheat, the wheat field with the disease conditions was selected for investigation. When the diseased leaf rate reached 10%, and the temperature in autumn was high and the rainfall was high, the fruit was immediately sprayed with punnet or triadimefon for prevention and treatment. 12.5 per gram of licorice WP 15 to 20 grams or 15% of triadimefon WP 75 grams of water 50 kilograms of spray, found a piece of defense, found a piece of anti-.
Wheat sharp eyespot occurs from wheat seedling stage to heading stage. The symptoms at the seedling stage are mainly in the underground part, which will harm the underground stems of wheat after emergence and appear brown spots or oval lesions, and develop upwards. It uses 20% triadimefon 75g or 20% Jinggangmycin 40 per acre. Grams spraying 50 kg of water on ridges are very effective.
Wheat whole rot disease pathogens of wheat full-bleeding disease can be impregnated in the wheat seedling stage, 20 to 30 days after emergence is the peak of dipping. For the land where wheat has been eroded in the past, use 12.5% ​​vinegar WP 15 to 20 grams or 20% fenprotin EC 120 to 200 milliliters of water to 40 to 50 kilos per acre. Reduce the incidence of heading in wheat.
Wheat buckwheat can also cause wheat yellow dwarf disease, in addition to direct damage caused by wheat production. When the planting rate exceeds 5% and 100 plantings are about 10, chemical control should be carried out. Use 25 ml per acre net or 20 grams of a large hero or imidacloprid 20 g water 40 ~ 50 kg, along the ridge spray, the effect is very good, and can also cure wheat spider mite.
The underground pests of wheat pests in the seedling stage of soil pests are mainly three species of earthworms, cockroaches and golden needles. It has been observed that when maggots are harmed, the young shoots of the young wheat seedlings are disorderly and the fractures are not neat; when the quail damages, the roots of the wheat seedlings are snapped and the fractures are neat; the golden worms are eager to eat the stems of the wheat and the damaged parts are in a mess, But the skin is still connected. Observing the damages of the wheat seedlings carefully, without digging the earth, it is possible to determine what kinds of underground pests are present in the wheat fields. A representative plot survey was selected 30 days after the emergence of wheat, and when the rate of dead seedlings reached 3%, pesticide control was immediately carried out. Wear the enemy's poisonous insect cake: Use 90% crystals of trichlorfon 75 grams per acre, first turn it off with warm water, add water to 1.5 kilograms, and mix and stir the sesame cake with 10 kg of sauteed saute. Or rapeseed cake, stuffy for 4 to 6 hours, served as a poison cake. Use maggots to put poison baits on wheat fields. This method extermination effect of up to 95%. Sprinkle poisonous soil: Use 2% methyl isofluosal powder per acre to mix 30 to 40 kilograms of finely ground soil. Mix well and apply to a wheat ridge in a ditch, which can effectively prevent the damage of earthworms and wireworms. Sprinkling irrigation solution: For plots that are damaged by spotting, 40% methyl isofluosal or 50% phoxim 0.5% water to 60-75 kg water per mu can be used. Worms have special effects.
Aphids and ticks In recent years, the occurrence of these two types of pests is very large and often endanger early seedlings. Can be used per acre with 90% crystal trichlorfon 75 grams, first with hot water and then add water to 1.5 kilograms, spray mix has been crushed sauteed wheat bran 5 ~ 7 kg, dubbed poison bait, Shun ridge spread trapping, effect well.