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I. Chemical weed control in wheat field (I) Weeding before sowing: After harvesting, 2 to 3 days before wheat is sown, use 10% glyphosate 500 ml/mu or 20% paraquat (tornado) water 150 ml/mu. Water 40 kg evenly sprayed to eliminate old grass.
(b) Weeding after sowing:
1. Barley Chemical Weeding: Use 50% Isoproturon powder 125-150 g/mu to spray 50 kg of water in the second leaf stage of wheat seedlings. When using pesticides, it is required to use enough water and try to use drugs when the soil is moist to increase the weeding effect.
2. Chemical weed control in wheat fields: Acres with 50 ml of 6.9% Fuma horse oil, used for 2 to 3 leaves after most of the weeds are germinated, spraying 50 kg of water per mu.
II. Chemical weeding in rapeseed field Before transplanting old straw: After harvesting rice, rapeseed should be treated with 10% glyphosate 500ml/mu or 20% paraquat (tornado) water for 2-3 days before transplanting. Mu watered 40 kg evenly to eliminate old grass.
(I) Chemical Weeding in Transplanting Rape Fields
1. After the rape is transplanted and planted, the mu will be sprayed with 30% osmium (grass and fine quinoline) EC 90ml and 50kg water, which can effectively control the large growth of grasses and broadleaf weeds. Since the ingredients of broad-leaved grasses in this medicine are mainly effective before weeds germinate, it is advisable to use the medicine sooner rather than later. If it is used too late, the control effect on weeds will decrease, and the use time should not exceed the latest. In mid-December.
2. In order to use the narrated weeds (see A. damnifolia) as the main field, we can use 5% sorghum grass emulsifiable concentrate 50ml/mu, or 10.8% high-efficiency herbage can EC 20ml/mu in the weeds. ~ Four-leaf period watered 50 kg spray.
3. For a plot dominated by broad-leafed grass (Chai grass), 50 kg of Turfgrass (Gotke) 30 ml/mu can be sprayed with 50 kg of water in the weed three to four leaf stage.
(2) Live rapeseed field for chemical weeding Direct seed oil rape Due to the low labor intensity of production, after the breakthrough of cultivation technology, the yield per unit area has increased significantly. The planting area in the city has expanded rapidly in recent years. The weeding of the live rapeseed by chemical, if applied improperly, often leads to poor phytotoxicity or poor weed control. Therefore, in the field of rapeseed weeding, special attention should be paid to selecting the appropriate herbicide species and corresponding control techniques.
1, to see the aphid and other grassy weeds dominated the field: in the four to six leaf stage of rapeseed, per acre can be used 5% of refined grass gram gypsum EC 45-50 ml, or 10.8% of high efficiency gaiseng can EC 20 ml Water 50 kg spray.
2. Fields dominated by broadleaf grasses such as Fokeng; in the four to six leaf stage of rapeseed, 50% grass removal agent (Gotak) per mu is used to spray 50 kg of water in 30 ml.
3. Fields of mixed weeds and broad-leaved weeds are produced in the four to six-leaf period of rapeseed, with 30% osmium per mu (grass and fine quinoline) and 90 milliliters of emulsion oil diluted to 50 kilograms.
Precautions:
1, according to the field of grass weeds occur, select the herbicide species counterparts, rational application.
2, the amount of drug spray should be accurate, the dilution should be uniform, do not leak spray, prevent heavy spray.
3. Because the efficacy of herbicides is closely related to the level of soil moisture in the field, when the pesticide is applied, the weather should be dry and the soil moisture should be low. Therefore, the amount of water should be increased to ensure that the herbicide herbicide effect is really exerted.
Spring flower seed treatment and weeding advice
Chemical weed control is an important technical measure in the cultivation of spring flowers. At present, the main weeds in wheat fields in our city are amaranth, netgrass, and broad-leaved weeds; in rapeseed fields, we use broadleaf weeds, such as high-efficient straw-covered grass and fine grass weeds. The occurrence of weeds is relatively prominent, and the dominant weed population has evolved into a rich and austere species. In addition, due to the fact that the city has implemented no-tillage wheat and no-tillage rapeseed cultivation techniques for many years, the damage caused by weeds in spring and spring flowering fields is heavy year after year, and weeds, such as the common weeds and netgrass, have become more serious each year. Based on the characteristics of the planting and weed occurrence of the spring flower crops in the city, combined with the results of the herbicide test conducted in the past few years, the following technical opinions were put forward for the chemical weeding work of the 2005 spring flower crops.
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