Cotton bell period management points
2021-05-28 18:51:23
1, pay attention to flower bell fertilizer. The specific time, quantity and method of fertilization should be flexibly controlled according to weather changes and cotton growth at that time. If the basal fat or buds are full, the rain is good, the cotton grows vigorously, and it is necessary to apply it properly. It is generally applied when the lower part of the cotton plant is sitting on 1-2 peaches. If the base fertilizer or bud fertilizer is not enough, there is no rain and drought, there is premature aging at the early flowering phase, and the flower and bell fertilizer should be applied early. The amount of fertilizer is appropriate to urea 7.5-10 kilograms per acre, deep 2-3 inches, 5 inches away from the cotton plant, cover the soil to be strict. When the fertilizer is lightly removed, 50 kg of 2% urea water per acre can be used, and 0.5 ml of production increasing spirit or 1 ml of gibberellin can be sprayed. In the cotton fields where the growth is slightly prosperous, 50 kg of 2-3% of superphosphate leaching solution or 1,000 times of potassium dihydrogen phosphate is sprayed per acre, and 14 ml of auxiliaries are added.
2. When it is dry and watered, it will be drained. When there is water shortage in the cotton field, timely watering, irrigating, and timely cultivating and protecting the soil in order to facilitate the development of cotton bolls. However, when there is too much water, drainage should be done in time.
3, timely fine pruning.
(1) Topping the heart. Timely topping is mainly based on cotton growth, soil strength, density, etc. For high-fertilizer, low-density cotton fields, it should be topped off before August 5th; medium-fertility, general-density cotton fields should generally be topping out at the end of July. The method of topping should be controlled by tapping, hitting the top, and not using too much.
(2) playing group points (also known as playing the side): the latest should be done in the first frost 70 days, so in mid-August should be the end of the heart to ensure that the late autumn peach in the Teng period when the bell reaches 40 days or more With the application of cotton chemical control technology, all the late peaches have become effective bells.
(3) Hit the old leaves and wipe the buds. Leaves over 60 days old are called old leaves, and the leaves are dark green and dull, and the nutrients made by themselves are insufficient for the consumption of their metabolism. At the same time, the leaf area is more shaded and there are many pathogenic bacteria on the leaves, losing the value of preservation. Should be promptly destroyed, pay attention to play the old stem from the bottom up in stages, avoid avoiding the fruit leaves. Axillary buds empty nutrient consumption, affect reproductive growth, while shading. Therefore, it should also be erased.
4, pest control. The bollworm, aphids, and red spiders continue to be harmed, and cotton bollworms have the greatest impact on the yield and quality of cotton. At this stage, the cotton plants are tall, causing many inconveniences to the field's spraying operations. Therefore, field control measures such as poisoning and smearing of dichlorvos were widely used in killing and spreading in fields. Or spray control: 80% dichlorvos + extinction + elimination of anti-Apothecary 1500 times solution or 50% phoxim + enemies + elimination spirit 2000 times, the use of liquid per acre shall not be less than 75-100 kg.
Fusarium wilt and verticillium wilt in the flowering stage are the prevailing stages. Attention should be paid to field observations to find the diseased plants in time, treat them as early as possible, and then remove the diseased plants to bring them out of the field. At the beginning of the disease, each plant was treated with 500 times liquid anti-fuming 0.5-1 kg plus 5-10 g ammonium bicarbonate once a day for 3-5 consecutive days.
2. When it is dry and watered, it will be drained. When there is water shortage in the cotton field, timely watering, irrigating, and timely cultivating and protecting the soil in order to facilitate the development of cotton bolls. However, when there is too much water, drainage should be done in time.
3, timely fine pruning.
(1) Topping the heart. Timely topping is mainly based on cotton growth, soil strength, density, etc. For high-fertilizer, low-density cotton fields, it should be topped off before August 5th; medium-fertility, general-density cotton fields should generally be topping out at the end of July. The method of topping should be controlled by tapping, hitting the top, and not using too much.
(2) playing group points (also known as playing the side): the latest should be done in the first frost 70 days, so in mid-August should be the end of the heart to ensure that the late autumn peach in the Teng period when the bell reaches 40 days or more With the application of cotton chemical control technology, all the late peaches have become effective bells.
(3) Hit the old leaves and wipe the buds. Leaves over 60 days old are called old leaves, and the leaves are dark green and dull, and the nutrients made by themselves are insufficient for the consumption of their metabolism. At the same time, the leaf area is more shaded and there are many pathogenic bacteria on the leaves, losing the value of preservation. Should be promptly destroyed, pay attention to play the old stem from the bottom up in stages, avoid avoiding the fruit leaves. Axillary buds empty nutrient consumption, affect reproductive growth, while shading. Therefore, it should also be erased.
4, pest control. The bollworm, aphids, and red spiders continue to be harmed, and cotton bollworms have the greatest impact on the yield and quality of cotton. At this stage, the cotton plants are tall, causing many inconveniences to the field's spraying operations. Therefore, field control measures such as poisoning and smearing of dichlorvos were widely used in killing and spreading in fields. Or spray control: 80% dichlorvos + extinction + elimination of anti-Apothecary 1500 times solution or 50% phoxim + enemies + elimination spirit 2000 times, the use of liquid per acre shall not be less than 75-100 kg.
Fusarium wilt and verticillium wilt in the flowering stage are the prevailing stages. Attention should be paid to field observations to find the diseased plants in time, treat them as early as possible, and then remove the diseased plants to bring them out of the field. At the beginning of the disease, each plant was treated with 500 times liquid anti-fuming 0.5-1 kg plus 5-10 g ammonium bicarbonate once a day for 3-5 consecutive days.
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