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Rice fields treated with Penoxsulam herbicide show good safety
Penoxsulam is a sulfonylurea herbicide. The drug is absorbed through weed leaves, stems and roots, and is translocated via the xylem and phloem to the meristematic zones where it acts. When used in rice fields, Penoxsulam provides both foliar treatment and soil residual (pre-emergence) control effects. After Penoxsulam treatment, weeds quickly stop growing; 2-4 days after application the growing points fade, and sometimes the leaf veins turn red; 7-14 days after application the stem tips and leaf buds begin to wither and necrose; 2-4 weeks after application the weeds die. The speed of weed death is related to the accumulation of branched-chain amino acids in the plant. Young
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What key points should be noted for late-planted rice when transplanting into fields prepared with stored water?
The general requirement for transplanting late-planted rice into fields prepared with stored water is to seize the water, prepare the field, and transplant the seedlings, increasing the number of hills, seedlings, and panicles. For rice fields transplanted with stored water, as soon as rainfall occurs or another water source becomes available, measures such as blocking, diverting, and pumping water should be taken immediately to seize the water, prepare the field, and transplant the seedlings. For late-planted fields, planting density should be increased. For seedlings aged 60-70 days, transplant more than 13,000 hills per mu (8 x 6 cun), with two seedlings per hill (2 grains of rice); for seedlings aged over 70 days, transplant more than 15,000 hills per mu (8 x 5 cun), with about 10 seedlings per hill, so that the number of seedlings planted per mu reaches 150,000
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Detailed Explanation of New Techniques for Weed Control in Lily Fields
I. Weed Control After Sowing and Before Sprouting After lilies are sown and before sprouting, apply 100-150 ml of 33% pendimethalin emulsifiable concentrate per mu (1 mu = 1/15 hectare, the same below) mixed with 50-75 kg of water and spray evenly on the ground, with a residual effect lasting up to 50 days; apply 200 ml of 48% butralin emulsifiable concentrate per mu mixed with 50-75 kg of water and spray evenly on the ground, with a residual effect lasting about 30 days; in addition, for each mu of lilies, one may also choose 120-150 g of 50% herbicide No. 1 wettable powder, or 500 ml of 30% propachlor emulsifiable concentrate, or 60
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Key Technical Points and Precautions for Irrigating Cotton Fields
Cotton is irrigated 3-5 times throughout the whole growth period, and irrigation should follow the principle of late first watering, quick second watering, and full third watering. The first watering is carried out at noon when the symptoms of water deficiency in cotton leaves are obvious, and it is best to wait until 10% of the plants in the cotton field have set bolls before applying the first watering. Generally, late June to early July is the best period for the first irrigation. For vigorously growing fields, delay watering until each plant has set 1-2 bolls. Strengthen water control to prevent excessive vegetative growth; the amount of the first irrigation should be small, with a water volume of 50-60 cubic meters per mu. The interval between the first and second watering is 8-10 days, and the second
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What causes premature senescence in cotton seed production fields? How should it be prevented and controlled?
As cotton seed production fields are planted year after year, premature senescence occurs from time to time, and has become an important factor restricting the increase of per-unit yield and the improvement of quality in seed production fields. 1. Causes of premature senescence 1. Continuous successive cropping of seed cotton fields In cotton-growing areas, cotton has been planted continuously on the same land for many years, resulting in a lack of organic matter in the plow layer, which cannot satisfy the soil's sustained fertilizer supply effect. At the same time, successive cropping causes the accumulation of pathogenic bacteria in the soil and a reduction in the number of insect-resistant bacteria, blocking the normal growth of the cotton root system, thereby affecting the upper growth of cotton and causing premature senescence. 2. Cotton
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Detailed Guide to Intercropping Oyster Mushrooms in Rice Fields
During the growth and development of rice, intercropping oyster mushrooms using the spaces between rice rows and the special conditions under the shade of rice clumps can provide suitable temperature and humidity conditions for the growth of oyster mushrooms (large temperature difference between day and night, good shading, sufficient scattered light, etc.), enabling high yields of oyster mushrooms, filling the market off-season when few mushrooms are available in summer, enriching summer vegetable varieties, and increasing rice farmers' income. I. Crop rotation arrangement and field plot design: Rice varieties should be selected with strong lodging resistance, tall plants, thick stalks, and resistance to rice planthoppers. Sowing in late May, transplanting in late June, with a density where
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How to control shortawn foxtail in garlic fields? Detailed control methods
During the garlic growing season, grass weeds such as shortawn foxtail (Alopecurus aequalis) in the field can be controlled with herbicides such as quizalofop-p-ethyl, haloxyfop-R-methyl, and clethodim. Apply the herbicide early, when the weeds in the field have basically all emerged and are at the 2-4 leaf stage; when the weeds are older, appropriately increase the application rate. In addition, when quizalofop-p-ethyl is used at temperatures below 10°C, its control effect on weeds drops noticeably, so apply it when the temperature is high if possible. Clethodim also has a relatively good control effect on weeds when used at lower temperatures, and since the temperature has been low recently, this herbicide can be given priority.
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Extreme potassium deficiency in cotton fields can cause large numbers of plants to die
Cotton is a crop sensitive to potassium deficiency, especially since the development of BT transgenic insect-resistant cotton, potassium-deficient cotton fields often show severe disease, premature aging, few and small bolls, poor boll opening and deteriorated fiber quality. Four or five years ago, rapid soil nutrient tests on cotton fields in central and southern Hebei showed that most soils had available potassium content below 80PPM (mg/kg), which is severe potassium deficiency, and some soils were below 40PPM, reaching the level of extreme potassium deficiency. The data measured by soil nutrient rapid testers is not precise; some soil samples measured available potassium content of 0
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Intercropping melons and peppers in cotton fields yields high comprehensive benefits
Xinchang Town in Shishou City, Hubei Province, located in the middle reaches of the Yangtze River, is a major cotton-producing area, with 23,250 mu of cotton planted year-round. In recent years, the town has actively optimized its planting structure, explored and applied the model of intercropping melons (or peppers) in cotton fields, achieving multiple harvests per year and multiple income sources from one field, improving the overall benefits of cotton fields, and blazing a successful trail in planting structure adjustment. In the past, the town planted cotton alone, generally producing 87 kg of lint cotton per mu, with an output value of 940 yuan. According to a 2002 survey, however, the town's cotton-melon (pepper) intercropping model produced output values of 315
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How can bamboo-leaf grass in cotton fields be controlled effectively?
First choose a suitable herbicide, then decide the dosage according to the weed species, leaf age and humidity level. For example, when using fluazifop-P-butyl to control annual weeds, when soil moisture is suitable, the effective ingredient dosage per mu is 9-17 grams; under drought conditions it is 17-24 grams; to control perennial weeds, the effective ingredient dosage per mu is 27-45 grams. Spray on the stems and leaves when grass weeds are at the 2-5 leaf stage. In summer, apply the herbicide on windless days, in the early morning and evening when temperatures are lower; uniform spraying is required, and keeping
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