Improved Cotton Variety subsidized and recommended: Demian 998

National examination of cotton 2010005

Characteristics: mid-early maturing hybrid varieties transformed with insect resistance gene, the growth period of late spring sowing in the Yellow River basin was 120 days. The seedlings are prosperous, the cotyledons are hypertrophic, the seedlings are strong, the whole growth period is strong, the uniformity is good, the bolls are concentrated, and the bolls are smooth. The plant height is 106.2 cm, the plant type is loose, the stem is stout and fluffy, the leaves are medium size, dark green, the bolls are round and large, the first fruit branch is 6.9nodes, the bolls per plant are 17.3g, and the weight of single boll is 6.4g. The lint percentage is 41.6%, the seed refers to 11.5 grams, and the pre-frost flowering rate is 90.6%. High resistance to Fusarium wilt, Verticillium wilt and cotton bollworm. The average length of the upper half of the HVICC fiber is 30.0mm, the breaking specific strength is 28.2N / Tex, the micronaire value is 5.2, the elongation at break is 6.3%, the reflectivity is 75.5%, the yellow depth is 7.6, the evenness index is 84.9%, and the spinning evenness index is 137.

Key points of cultivation techniques: 1. The cotton area of the Yellow River basin is generally sown in early May and should be covered with plastic film. two。 The planting density per mu is 3000 to 4000 plants per mu with medium fertility. 3. Apply sufficient base fertilizer, early heavy application of flower and boll fertilizer, and timely watering in case of drought in the flower and boll period. 4. According to the cotton growth and weather conditions, reasonable control, so that the front is light and the back is heavy. To simplify the whole plot, chemical control should be increased appropriately. 5. The first and second generation cotton bollworm does not need to be controlled, while the third and fourth generation cotton bollworm should be controlled in time when there are more than five larvae of more than two bolls. during the whole growth period, attention should be paid to the control of other pests such as blind bugs, whitefly, red spiders and Spodoptera litura. 6. It is not suitable to plant Verticillium dahliae in seriously ill areas.

Approval opinion: the mid-mature hybrid varieties transformed with insect-resistant genes have obtained the safety certificate for production and application of agricultural genetically modified organisms, and the name of transgenic organisms is sGKz55 (Demian 998), which meets the national cotton variety approval standard and has been approved. It is suitable for planting wheat and cotton in southern Hebei, northwest and southwest of Shandong, eastern and northern Henan, and north of Huaihe River in Anhui and Jiangsu, and shall not exceed the scope allowed by the safety certificate of agricultural genetically modified organisms.