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Introduction to the New Cotton Variety Yuncai N3738

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I. Characteristics and traits. The cotton fiber of this strain is naturally green; the plant grows vigorously and steadily, with medium-sized leaves and prominent leaf lobes; the plant has a tower shape, and the growth period is 122 days. Boll setting is outstanding, early maturing without premature senescence, and it has good yielding ability. The bolls are relatively large and oval-shaped, with a boll weight of 4.1 grams and a lint percentage of 28.7%. It has broad adaptability, good yield stability, and high yield potential. II. Fiber quality and disease resistance. Tested by the Cotton Fiber Quality Testing Center of the Ministry of Agriculture, the 2.5% span length is 27.6 mm, and the Micronaire value is 2.68, which is a relatively large improvement over the fiber quality of the green cotton "Xincai No. 7" approved in 2005 by the ** autonomous region, especially in cotton fiber strength.

I. Characteristics and traits. The cotton fiber of this strain is naturally green; the plant grows vigorously and steadily, with medium-sized leaves and prominent leaf lobes; the plant has a tower shape, and the growth period is 122 days. Boll setting is outstanding, early maturing without premature senescence, and it has good yielding ability. The bolls are relatively large and oval-shaped, with a boll weight of 4.1 grams and a lint percentage of 28.7%. It has broad adaptability, good yield stability, and high yield potential.

II. Fiber quality and disease resistance. Tested by the Cotton Fiber Quality Testing Center of the Ministry of Agriculture, the 2.5% span length is 27.6 mm, and the Micronaire value is 2.68, which is a relatively large improvement over the fiber quality of the green cotton "Xincai No. 7" approved in 2005 by the ** autonomous region, especially in cotton fiber strength.

In 2006, identified by the Plant Protection Laboratory of the Shanxi Cotton Research Institute, the Fusarium wilt disease index was 7.5%, and the Verticillium wilt disease index was 40.5%. In the field it showed resistance to Fusarium wilt and no resistance to Verticillium wilt. It has good tolerance to cotton aphids, but it is not an insect-resistant cotton.

III. Key cultivation points

1. It is suitable for concentrated contiguous planting, and the planting distance from other cotton varieties should be kept at more than 500 m to prevent cross-hybridization and mixing.

2. The individual plant of this variety is smaller than that of ordinary spring-sown white cotton, so the planting density should be increased by 5-7% compared with white cotton; the general density should be 3000-4500 plants per mu.

3. If insect pests are found at the bud stage, control them promptly; in rainy years, carry out weeding and chemical growth regulation well.

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