There are many pests in wheat in early spring. What diseases and pests should be controlled in early spring wheat?

1. Suppress with hoeing, maintain moisture and increase temperature to promote early development

The favorable time for weeding in early spring is the "peak period", that is, when the "surface layer" thaws 2 cm, start weeding. At this time, the soil moisture conservation effect is the best, which is conducive to early greening, early rooting and strong seedlings of wheat. The first hoe in late-cropping wheat fields should be shallow to prevent root damage and stubble and seedling damage; salt-infested wheat fields should be hoed in time during the "peak period" and after rain to inhibit salt return and reduce dead seedlings; if the wheat fields are sown too deep, they will It is necessary to clear the ridges and trees in time to make the tiller nodes shallower, which will help to increase the temperature and increase the tillers and root system. In wheat fields where seedlings are flourishing or growing too vigorously, the root system should be plowed deeply during the rising period, about 10 centimeters, to break the old roots and spray new ones to make the vigorous seedlings strong. In early spring, the hoe should be shallower for the first time, and then as the temperature rises, the hoe should be gradually deepened, so that the roots can be firmly rooted. Try to row the hoe 3 to 4 times before jointing.

In spring, we should adapt to local conditions and achieve "three pressures and three no pressures". The "three pressures" refer to: suppressing wheat fields with extensive land preparation and lots of soil; suppressing dryland wheat fields without irrigation conditions after the soil thaws; suppressing wheat fields with overgrown weeds before and after the rising period. The "three no pressures" mean: no pressure on wheat fields with frost; no pressure on wheat fields in saline-alkali waterlogged depressions; and no pressure on wheat fields that are too wet. In addition, suppression should be combined with weeding, generally suppressing first and then hoeing to achieve the effects of increasing soil moisture, conserving moisture and increasing temperature.

Second, it is comprehensive control of pests, diseases, pests and weeds

For wheat powdery mildew and rust, spray 50 grams of 20% triadimefon EC per 1/15 hectare (1 mu) or 75g of 15% wettable powder, 60-70kg of water, to prevent powdery mildew and rust. When the wheat is fully harvested, 100 grams of 20% triadimefon EC or 150 grams of 15% triadimefon wettable powder can be sprayed along the ridge direction per 1/15 hectare, and 50 to 80 kg of water can be sprayed. In the early stage of wheat jointing, 100-150 ml of 5% Jinggangmycin aqueous solution and 50-70kg/1/15 hectare of water can be used to spray Rhizoctonia solani at the base of the wheat stem. To control wheat aphids, 6 grams of 50% clear aphid mist wettable powder and 50 to 60 kilograms of water can be used per 1/15 hectare. To control wheat spiders, 25 ml of 40% omethoate or 50 ml of 20% dicofol can be used per 1/15 hectare, and 30 to 40 kg of water can be sprayed to control bovine planthoppers and prevent bush dwarf disease. In addition, attention should also be paid to strengthening the control of wheat yellow dwarf disease, bush dwarf disease, sawflies and underground pests.

3. Chemical herbicides are used to control weeds in fields.

Currently commonly used herbicides include 2,4-d, dimethyltetrachloride, superstar, Huanglong, Hummer, Shima, etc. Ma Xu and Shi Ma can be used to control most monocotyledonous weeds such as oats. Shi Ma can be used to control gramineous weeds in wheat fields. It can also control some broadleaf weeds such as chickweed and shepherd's purse during stem and leaf treatment. Super star, dimethyl tetrachloride, 2,4-butyl ester, phenyl Huanglong, etc. Can be used to control dicotyledonous broadleaf weeds. The weeds in wheat fields in spring are mainly broad-leaved tree species, as well as superstar, benzoa, etc. should be chosen whenever possible. For wheat fields mixed with monocotyledonous weeds and broadleaf weeds such as oats, these two weeds can be controlled by adding 60 ml of 6.9% Fuma EC to 1/15 hectare of MCTC or Superstar liquid. The application period of herbicides is generally from greening to rising. It is necessary to strictly follow the instructions for use and operate carefully to avoid phytotoxicity.