Xinmian 33B is a new cotton variety with high resistance to H. armigera developed by the cooperation between U.S. Cotton Company and Monsanto Company using modern high-tech methods. 1. Characteristics: The seedlings of Xinmian 33B grow steadily, the main roots are thick, the lateral roots are well developed, the main stems are hard, lodging resistance, the fruit branches are lifted, the plants are compact, the leaves are medium and small, which is conducive to ventilation and light transmission, and the bell is strong and concentrated. The bell is slightly smaller, but the bell shell is thin, and the boll opening is smooth, easy to pick, resistant to wilt, and resistant to yellow wilting. It is a medium-early-maturing variety. The variety has high yield, wide adaptability, strong stress resistance, and excellent fiber quality. It is suitable for planting in spring sowing areas in Hebei and Shandong. 2. Cultivation techniques: According to the variety characteristics of Xinmian 33B, the base fertilizer must be applied in management, the flower and bell fertilizer should be re-applied, and the top dressing should be supplemented. This should be scientifically controlled to prevent premature senescence and timely rotation, so as to give full play to the increase in new varieties. potential. (1) Timely sowing and reasonable close planting. When the 5 cm ground temperature stably passes the 16 °C, the cold head is sown in the cold, requiring the mulch to cover. (2) Balanced fertilization, striving for early prevention of premature aging. In accordance with the principle of "stable nitrogen, phosphorus, potassium, and micro-amount," long-term fertilizers can be used in combination with available fertilizers. (3) Check the seedlings to fill the seedlings, put the seedlings in time, and set the seedlings in due course. (4) Scientific pruning, systematic control. The focus of pruning is to go to nutrition, top and tip. Reducing Anhua control must adhere to a small number of times. (5) timely release film. (6) Pest control. Bao Ling cotton is not insectless cotton, and it should be promptly removed when pests such as underground pests, red spiders, cotton aphids, blind beetles, beet armyworms, and cotton bollworms meet prevention and control targets.
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