The control of golden foxtail

Golden Setaria glauca (L.) Beauv. It is an annual grass herb that is widely distributed throughout the country and mainly harms dry crops such as millet, corn, sorghum, wheat, soybeans, cotton, vegetables, and fruit trees.

Morphological characteristics Stems erect or base oblique, rooting outside the section, plant height 20-90cm. Leaf blade slender, leaf base more hairy; leaf sheath flat and narrow, light red, smooth and hairless; ligule circumscribed by 1mm pilose. Panicles terete, erect; bristles golden or brownish, 8mm long, elliptic; spikelets 1–2 flowers, apex slightly pointed, usually only 1 in a cluster developing; 1 spikelet 1 /3 or so, two spikes are half of the spikelets, with 5-7 veins, the first outer nevus and medulla and spikelet equal length. Grain tips, mature with horizontal wrinkles, back bulge.

Ecological characteristics are born in more humid farmland, ditches or roadsides; large seed yields, high germination rates, and breeding can occur. Seedlings are not neat and can be divided into wholesale buds, causing many difficulties in weeding. The suitable temperature for germination is 15-30°C, and it can germinate at 10°C, but the germination rate is low and the emergence is slow. The depth of emergence in the soil layer is 0-8cm. The emergence of seedlings in early May in Heilongjiang, sustainable until late July, flowering in July-August, seed maturity in August-September, mature seeds must live through winter dormancy before germination. The Shanghai area has emerged in mid- and late April, peaking in late May, and peaking in mid-September and 2-3 generations a year.

Control methods

(1) Agricultural control.

1 Care should be taken to clean the sowing materials for newly opened fields, and strict selection is required to prevent the introduction of grass seeds with sowing materials.

2 Pay attention to the application of decomposed manure. Organic manure should be stacked at high temperatures of 50-70°C for 2-3 weeks to kill the golden foxtail seeds. Pay attention to the irrigation and cleanliness. There are a large number of golden green foxtails in the canals and ponds. The seeds fall into the water and enter the fields with water, causing damage. They should try to clear their seeds.

3 Clear the golden foxtail around the plots, on the roadsides and in the fields, and reduce the source of grass seeds. Shallow ploughing before sowing, cultivator during seedling stage, prevention of golden foxtail, deep plowing of land in autumn, burying of grass seed or sowing of water before sowing, induce grass seed germination and destroy it. To eradicate golden foxtail by manual weeding, it is necessary to follow the principle of eradication, eradication and elimination in order to eliminate it in time.

(4) Coverage and shading with mulch, organic matter, gravel, etc. can also eliminate yellow foxtail.

(2) Pesticide control.

1 Paraquat controls forest belts, orchards, non-cultivated fields, field ridges, and golden side-grass.

In the golden foxtails and the vigorous growth stage, 20% water solvent per hectare is 1500-3900 mL, about 375 kg of water, and the stems and leaves are evenly sprayed. When the height of grass is more than 30cm, the dosage per hectare is 3000-6000mL and the water is 300-375mL. Can also be treated before sowing topsoil control has emerged yellow foxtails, 1125-3000mL per hectare, 375kg of water, even spray, spray after spraying can also be treated before the seedlings unearthed golden foxtailia, ibid, crop emergence stoppage use. It can also be eliminated by directed spray in the above-mentioned method during the vigorous growth of Setaria viridis in the width of the crop.

2 Glyphosate can control weeds and can be used in orchards, mulberry fields, and woodlands.

During the prosperous period of weeds, when 5-6 leaves, use 10-20% of water per hectare, or 7.5kg of 10% water solution plus 1500-2250mL of diesel, 300-450kg of water, and strictly direct the spraying of weeds. Stem leaves. Before the crops were sown, the golden foxtail had emerged, with 75-11.25 kg of liquid per hectare, about 3000-4500 kg of water, and evenly sprayed golden bristly stems and leaves. At the peak of the crop, the golden color of Setaria spp. was sprayed in the above manner. The nozzles were under low pressure and the nozzles were well covered.

3 Use 35% spermatozoa to kill 50-100 mL of emulsifiable concentrate per hectare.

4 Gold yellow foxtails 2-5 leaf stage, with 35% per hectare to stabilize the EC 600-1125mL, about 450kg of water, spray. The effect is good when the soil is moist. Suitable for non-grass crops such as soybeans, vegetables, cotton, tobacco, sunflowers and orchards.

5 thatch prevents weeds. During its vigorous growth, water is sprayed with 60% sodium salt 7500-12450g per hectare.

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