In the autumn, the prevention and control of wheat diseases, pests and weeds was advanced.

In late September, wheat in the Beijing area was gradually put into sowing. Wheat diseases, weeds and weeds are important factors affecting wheat yield. Wheat pests and diseases in the fall seedling stage mainly include underground pests, wheat stubble, powdery mildew, leaf rust, weeds, etc., in order to prevent and treat diseases, pests and weeds in autumn wheat in advance. Not only can control the pests of seedling stage, but also can reduce the base number of pests and pesticides after winter, which is of great significance for ensuring the harvest of wheat in the following year.

Wheat has these pests and weeds

Underground pests The city's underground pests that damage wheat include golden needles, ticks, and cockroaches. The former two were the main types of damage. Golden worm is the general name for the larvae of T. urticae. There are three types of worms, including D. difficile, C. elegans, and D. vinifera. The larvae can bite off freshly emerged wheat seedlings, and can also feed into the roots of already grown up seedlings. The victim is not completely snapped and the fractures are not neat. Thistle is the general name of the larvae of the larvae. It mainly damages the autumn seedlings and the spring seedlings of wheat. It can bite the underground rhizomes of wheat, resulting in the lack of seedlings and ridges.

Wheat bran is commonly known as an insect, and it is one of the main pests that injure wheat. The main species include wheat long tuber, grain tuber tuber, wheat birch, and wheat long tube tuber, with wheat tuber tuberculosis accounting for the most. Wheat bran can either directly suck wheat sap or spread viral disease. In the wheat seedling stage, the wheat bran is mostly concentrated on the back of the wheat leaf, leaf sheath and heart leaf. The damage is light yellow spots. In severe cases, the leaves yellow, even the whole plant withered.

During the whole growth period of wheat, powdery mildew disease can occur on all parts of the ground. The pathogens mainly damage the leaves, and in severe cases, they also damage leaf sheaths, stems and ears. The surface of the diseased area was covered with a layer of white powdery mildew. Later, the mildew layer gradually turned gray from white to brown and scattered black particles. Severely diseased plants are often short and weak, and spikes that are not headed or extracted are short and small.

Rust commonly known as jaundice, stripe rust, leaf rust, stem rust three, its common feature is the victim site produces a bright yellow, reddish-brown or dark brown uredia spores and teliospore heap. The difference was rust formation, leaf rust, and stem rust was a large erythema. The occurrence of wheat leaf rust in this city is dominated by leaf-based disease, and sometimes it can also damage leaf sheaths and stems.

Sophora japonica, also known as yellow flower grass and wheat straw, is one of the main weeds that damage winter wheat. The seed is extremely small, easily mixed with wheat seeds and transported with seeds. It can also spread with farmyard manure, ground watering, and wind.

Prevention

In the autumn of wheat disease, weed and weed control, prevention and control measures of “seed agent treatment + prevention of pests and diseases at seedling stage” can be adopted.

Seed drug treatment

Pre-sowing wheat seeds or seed dressings is the main measure for preventing and controlling underground pests and wheat seed propagation, soil-borne diseases, and powdery mildew and leaf rust in autumn seedlings. It also ensures the protection of wheat seedlings and seeds. The key measures for seedlings. Farmers can scientifically adjust the types of coating or seed dressing agents according to the occurrence of local diseases and pests to ensure that wheat “white seeds” does not fall to the ground.

Seed coating formula can be used Obari 31.9% suspension seed coating agent 6 ml/kg (seed volume, the same below), 60% imidacloprid suspension seed coating agent 4.8 ml/kg +6% tebuconazole suspension seed coating agent 0.5 ml / kg, 70% thiamethoxam seed treatment dispersible granules 4 g / kg + 6% tebuconazole alcohol suspension seed coating agent 0.5 ml / kg.

When seed dressing, 50% phoxim EC can be used as the pesticide, 50% carbendazim WP can be used as the bactericide, and 0.2% of the seed amount can be used for dressing. The insecticide and the bactericide can be mixed with the liquid. Dirty stuffing for 4-6 hours, soak after drying, among them, phoxim seed dressing should pay attention to dark operation.

Seedling pests and weed control

In the autumn wheat field, the small weeds and poor drug resistance are favorable timings for chemical weed control. Chemical weeding can be carried out in accordance with the occurrence of weeds in the field. Chemical weeding should be carried out after the wheat tillering stage and weeds at the 2-4 leaf stage. For wheat fields dominated by sow weeds, such as sow plant and leeks, 10% of tribenuron-methyl WP may be used per acre, or 1 gram of 75% tribenuronic-ethyl sulfate, or 72% 2,4- 50ml of butyl phthalate cream is used for prevention and treatment; 70% of chlorsulfuron-methyl dispersible granules can be used to prevent and treat 70% of cornfields, such as bromegrass and gramineous weeds.

When the wheat stubble and the planthopper are serious in the wheat field and reach the prevention and control index, it is necessary to conduct chemical prevention and control in time to prevent damage to the wheat seedlings and transmission of the virus disease.

common sense

Seed coating refers to the use of adhesives or film formers, with special seed coating machines, to encapsulate non-seed materials such as bactericides, insecticides, trace fertilizers, plant growth regulators, colorants or fillers. Outside of the seed, so that the seed into a spherical or basically maintain its original shape, seed coating agent can quickly solidified into a film, so it is not easy to fall off. Seed coating has the effects of improving the resistance and disease resistance of wheat, accelerating germination, promoting seedling growth, and increasing yield.

Compared with conventional seed dressing, seed coating can comprehensively prevent and treat diseases and insects, save provincial and provincial medicine, protect the environment, and have a high input-to-output ratio.

Pharmaceutical Introduction

"Aubrey" is a 31.9% imidacloprid suspension seed coating agent (30.8% imidacloprid + 1.1% tebuconazole) and is a specially-designed insecticide and bactericide seed treatment agent for Bayer crops such as wheat.

The broad spectrum and systemic absorbance of the two active ingredients of "Aubrey" can prevent and treat most of the diseases and pests of wheat, reduce the incidence of virus disease and prevent its spread. It has excellent control effects against scattered smut, sheath blight, etc.; the effective period of locust is more than 6 months, and can control the damage of aphids; “Obairei” also shows the effect of strong seedlings, which is effective after increasing the return of green wheat. The number of tillers has a significant increase in production; “Alburyi” also enables crops to have an “adversity masking” function. Under adverse conditions (heat, flood, drought), plants treated with “Aubrey” are stronger, It is healthier, drought-resistant, frost-resistant, and resistant to fall, ensuring increased yield and quality.

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