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What are the methods for controlling aphids during the cotton seedling stage?
The suitable temperature for cotton seedling aphids is 18°C to 25°C, and after rain the temperature rises quickly, which is very suitable for seedling aphids in terms of temperature, and there is a possibility of a heavier outbreak of seedling aphids. 1. Agricultural control: eradicate weeds in cotton fields, strengthen water and fertilizer management, and promote early development of cotton seedlings; combined with thinning and final thinning of seedlings, pull up aphid-infested plants and carry them out of the field to be burned in a concentrated manner. 2. Chemical control: before the seedlings have 3 true leaves, when the rate of curled-leaf plants reaches 5% to 10%, and after 4 true leaves when the rate of curled-leaf plants reaches 10% to 20%, use 10% imidacloprid wettable powder
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Key Management Points and Precautions for Cotton During the Full Square Stage
At present, most cotton in our province has entered the full square stage. In view of the current high temperatures, scorching heat, drought and little rain in most areas, the following management technical recommendations are specially put forward for the reference of the broad masses of cotton farmers. 1. Watering and topdressing. Water appropriately and apply a small amount of nitrogen fertilizer to promote seedling growth. For cotton fields with poor soil fertility, insufficient or somewhat low base fertilizer, and weak cotton growth, 5 kg of urea per mu can be topdressed along with watering. Phosphate fertilizer and potassium fertilizer can also be added at the same time; generally, 5 kg each of diammonium phosphate, potassium sulfate or potassium chloride per mu. 2. Proactive chemical regulation. Spray mepiquat chloride before watering for proactive chemical regulation
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What are the key management points during the Shiitake mushroom mycelium growth stage?
Key management points during the Shiitake mushroom mycelium growth stage The suitable conditions for Shiitake mushroom mycelium growth are a temperature of 22°C-26°C, air humidity of 60%-65%, good ventilation, and darkness or weak light. From 1-6 days after inoculation, it is the period of mycelium germination and colonization. Since the mycelium grows weakly, the temperature of the mushroom bags is 1°C-3°C lower than room temperature. To provide suitable temperature for the mycelium, the room temperature should be adjusted to 28°C-29°C. Room temperature, pile temperature, and bag temperature should be measured every day, with bag temperature as the main factor for regulating room temperature and pile temperature. At this time, the mushroom bags should not be moved to prevent contamination by foreign fungi
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What are the precautions for fish harvesting during freezing periods?
The Spring Festival is approaching, which is an important period for harvesting aquatic products. Brood fish and fish about to be sold are raised together, so attention must be paid to protecting the brood fish from freezing. Do not carry out operations when freezing occurs. Add water to ensure a water depth of 1.5 m to 2 m to stabilize the temperature. Try to avoid exposing the brood fish to the air. Harvested brood fish should be bathed in 2% salt water for 15 minutes to 20 minutes to prevent and treat saprolegniasis. In places where eels are raised in net cages, the net cages should be promptly sunk to the bottom to contact the silt, and straw should be added on top of the cages for coverage, with operations reduced as much as possible to ensure safe overwintering.
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What to do when cotton develops red leaf blight during the boll-setting stage
Control measures for cotton red leaf blight: 1. Apply fertilizer reasonably, and skillfully apply the cotton topping fertilizer; nitrogen, phosphorus and potassium should be applied together or foliar fertilizer should be applied. 2. Strengthen field management, cultivate frequently, improve root respiration conditions, promote root development, prune and remove side branches in time, remove old leaves and control pests and diseases. 3. Spray for protection, using 70% mancozeb or 75% chlorothalonil 600-800 times solution or 70% thiophanate-methyl 800-1000 times solution plus foliar fertilizer (potassium dihydrogen phosphate, Lvzhiyuan, etc.) for spraying, once every 5-
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What are the key measures for managing cotton during the flowering and boll-setting stage?
The main goals of cotton management during the flowering and boll-setting stage are: preserve bolls, increase boll weight, and prevent premature senescence. 1. Apply heavy flowering and boll fertilizer: The flowering and boll-setting stage is the period when cotton needs the most fertilizer throughout its entire growth period. For cotton fields with high soil fertility, abundant rain and good soil moisture, and vigorous cotton plant growth, topdressing can be done at the full flowering stage; for cotton fields with average soil fertility, drought and poor soil moisture, and weak cotton plant growth, early and heavy application should be done, with topdressing at the initial flowering stage. Generally, apply 15-20 kg of nitrogen-potassium compound fertilizer per mu. Continue to do a good job of intertillage and loosening the soil, following the principle of shallow rather than deep cultivation. 2. Water during drought, drain during waterlogging
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Technical Guidance on Cotton Management During the Flowering and Boll-setting Stage
The flowering and boll-setting stage of cotton is a critical period when vegetative growth and reproductive growth proceed together. During this stage, the plant gradually shifts from being dominated by vegetative growth to being dominated by reproductive growth. The plant grows vigorously with a large daily growth increment. It is the peak period of fertilizer and water demand in the plant's entire life cycle, and also the key period for forming economic yield. Timely and meticulous management is essential, adapted to local conditions and to the condition of the seedlings. Attention must be paid to pest and disease control, chemical regulation, pruning, and intertillage loosening of the soil, while at the same time rationally and scientifically formulating fertilizer and irrigating promptly and in appropriate amounts, so that individual plants grow steadily, the plant architecture and field population structure are reasonable, ventilation and light penetration are good,
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How to manage and care for raccoon dogs during pregnancy? These key points are what farmers need to master
I. Feed supply. Many farmers believe that after a female raccoon dog becomes pregnant, the amount of feed and supplements should be increased to boost nutrition. However, years of practical experience have proven that doing so is counterproductive. The correct ration of feed and supplements should be as follows: within 40 days after mating is completed, the feeding frequency should still be once per day, and the feed amount per animal is generally no more than 35 grams of corn flour or complete feed, 20 grams of fish meal, and for eggs, at most 1 egg (about 75 grams) for 5 raccoon dogs. If overfed
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Ten preventive measures to take during the peak growing season for adult fish
1. Prevent starvation. During the peak growing season, adult fish have a large food intake, so more bait and feed should be given. For ponds mainly stocked with grass carp, crucian carp, tilapia, etc., mixed feed such as wheat bran, oilseed cake meal and soybean dregs, as well as fresh feed such as tender grass and plant stems and leaves, should be given. Under normal circumstances, the daily amount of coarse feed accounts for 10% of the total fish in the pond. 2. Prevent fertilizer shortage. During the peak growing season, the amount of fertilizer required by fish accounts for 80% of the fertilizer to be applied during the whole period, so every 5 to 7 days, apply 60 kg to 100 kg of fully fermented human and livestock manure per mu, and 2 to 3 kg of nitrogen and phosphorus chemical fertilizer.
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How to formulate feed for pigs during lactation in a scientific way
Sows need large amounts of nutrients during lactation to support milk production. At peak lactation, a sow's milk production capacity exceeds the nutrients she takes in through feed and the nutrients lost through milk, so her body condition declines rapidly. Preparing high-quality, high-nutrient-density feed for lactating sows is the best way to resolve this contradiction. Feed Formula 1: Lactation Feed Formula 1 in Table 4-3 avoids as much as possible the use of bulky feeds such as alfalfa and rice hull bran. In the design of lactation feed formulas, unknown nutritional factors appear less important, and this formula uses high-energy feed corn and high-protein feeds such as fish meal and soybean meal as much as possible, so that the volume of the compound feed is reduced as much as possible and the nutrient concentration is increased as much as possible. The formula also uses synthetic amino acids to further fortify the first limiting amino acid and improve the utilization efficiency of feed protein. To ensure milk quality, the amounts of micro-ingredients in the formula remain unchanged from those in gestation feed. Compound feed produced with this formula, when used to feed high-yielding sows nursing about 10-15 piglets, can achieve very ideal lactation and nursing results.
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