I. Features and hazards
The Alternanthera philoxeroides belongs to the family Polygonaceae, which is a perennial weed. The alias is also called water peanut, revolutionary grass, water leeks, etc. The base of the stem is ridged, the upper part is ramped up, hollow, smooth, knotted, and the ground or roots on the water surface. In my county, stems and shoots are mainly propagated, and in May-September it is a period of high growth, which mainly occurs in rice fields, orchards, lawns, and vegetable fields.
Second, control technology
1, intensive cultivation, manual removal: usually to strengthen the management of the field, not coarse-farming cultivation, intensive cultivation. During the period of Alternanthera philoxeroides seedlings, it was repeatedly and carefully removed and cleaned up, and the remaining stem sections in the soil were dug, concentrated, dried and burned. Areas that did not occur should be strengthened.
2, chemical control methods:
Controlling Alternanthera philoxeroides in the rice field 10-15 days after planting seedlings or transplanting planted seedlings in the field, the field has already had a large number of grass seedlings of Alternanthera philoxeroides and other weeds. 20g +10% new effective 6g/mu; or 50% fast kill 稗 20g +10% farmer 15g/mu; 20% fluoxyl 50g watered 30kg, evenly sprayed to the miscellaneous The stems and leaves of the grass. The field water shall be drained 1-2 days before spraying to expose the grass seedlings to the surface so that the liquid medicine can be better adhered. Rehydration after 1-2 days and maintain a 4-5 cm deep water layer for 5-7 days, during which time it can not be drained. If water is insufficient, it can be filled with water slowly. Afterwards, it is managed as usual.
Control of Dryland Alternanthera philoxeroides (1) Orchards In flat soil orchards with a relatively moist soil, dense densities of Alternanthera philoxeroides occur frequently. The most effective herbicide to control this weed in this orchard is 10% glyphosate, 41 % Farma water agent, 74.7% farmer music water soluble granules. Appropriate dosages are: 250 ml glyphosate 900-1200 ml/mu; Roundup 200 ml/mu; Farmers music 150-200 g/mu, watered capacity 30 kg/mu. In addition to the effective elimination of Alternanthera philoxeroides, the three herbicides can also eliminate all one-year-old and perennial weeds. In order to increase the absorption of weeds to improve their efficacy, the stems and leaves of weeds should be selected to be quite lush, but the plants should be applied before flowering. Note that the efficacy must be ensured by using clean water instead of mud water and sewage. They are all herbicides that have to deal with all kinds of weeds. They must be sprayed with stems and leaves of weeds in a targeted manner to prevent droplets of liquid medicine from drifting to the leaves and twigs of fruit trees to prevent phytotoxicity. After 8 hours of spraying, it does not affect the efficacy of rain. (2) The vegetable seeds sown in the vegetable garden before the seedlings have not yet germinated and emerged before seedling emergence, or before the transplanted vegetable seedlings on the rapeseed meal, or after the harvesting of the vegetable seedlings, are similar to the fruit orchards, and can effectively eliminate hollows that occur in the vegetable weir and the surrounding. Lotus weeds and other weeds. (3) Crops of other dryland crops sown before the emergence of seedlings have not yet emerged, or after the crop is harvested with a net water of 14% peanuts 30ml; 20% sulfur. Wheatgrass 50g 250ml; Glyphosate 900-1200ml/mu; Roundup 200ml/mu; Farmer Le 150-200g/mu Watered 45kg spray.
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