GK19 (National Insect-resistant Cotton No.19) is an excellent monovalent transgenic cotton, which was selected from the "863" transgenic cotton plant by Jingmen Genesis Seed Co., Ltd. and participated in the transgenic cotton production in 1998-1999. The new "863" joint test and the Hubei Province cotton-resistance regional test have the first comprehensive character and stable pest resistance. In 1999, the Ministry of Agriculture approved the arrangement of the seed management station in Hubei Province and GK19 was developed in the main cotton producing area in Hubei. The planting of 10,000 mu, which showed strong resistance to cotton bollworm, good resistance to wilt and wilt resistance, high lint yield, excellent fiber quality, and significant economic benefits, was welcomed by the cotton farmers and local leaders. GK19 was approved by the Xinjiang Autonomous Region Variety Approval Committee in 2000. Characteristics 1. Strong resistance to cotton bollworm In Hubei Province, bollworm occurred in 1999. The average number of eggs in three to five generations of cotton bollworm in the demonstration area was 38.7, 414.7, and 210.7 eggs. The planting households used to control cotton aphid and red. Apart from pests such as spiders and aphids, three or four generations of untreated cotton bollworms and some of the five generations of plots control cotton bollworm once. Field survey results showed that there were no insects in the three generations of GK19, 0.7 in the fourth generation and 3.9 in the fifth generation. At the same time, the development of the disease was stunted, and it was in a young age. The damage to cotton was lighter than that of the normal cotton bollworm. The survey was around 0.5%. In addition, GK19 is highly resistant to lepidopteran pests such as bridge-building insects, corn borers, and pink bollworms, and no control is required during production. 2. Good agronomic traits and high yield. GK19 has good seedling quality, strong seedling potential, moderate leaf size, light green leaves, loose plant towers, good ventilation and light transmission, 5-8 fruit node branches, and reproductive period It is short, about 122d, with fast growth and development. The buds bloom early, and the flowers before bloom have a high yield, and the pure spring cotton reaches 92%-95%. GK19 has high yield, field surveys, with an average of 16.7 fruiting branches, 22.1 bolls per plant, 5.18 g boll weight, 63,400 bolls per 667m2, and 41.32% lint count. General planting plots produce 250kg seed cotton per 667m2, lint 90kg, some high-yielding plots of seed cotton 300kg, 118.5kg lint yield 6%-10% higher than the local conventional cotton varieties, than the conventional cotton that failed to effectively control the cotton bollworm damage Increase production. 3. Strong disease resistance In 1999, due to climatic reasons, the occurrence of yellowing and wilt in the cotton fields in Hubei Province occurred. The conventional cotton-resistant varieties such as Ekang Cotton No. 3 were also threatened by verticillium wilt, Tianmen, Jingzhou and other cities GK19. The survey area survey showed that the number of fusarium wilt in E3 cotton was 6.7, that of Verticillium wilt disease was 29.1, GK19 wilt disease was 3.2, Verticillium wilt was 22.3, and GK19 was more resistant to wilt and verticillium wilt than Ekang 3 cotton. Planting households responded that GK19 had less incidence and milder disease, and had no impact on growth and development. Its disease resistance was better than other varieties. GK19 cotton field did not suffer from the common premature aging of insect-resistant cotton and the phenomenon of red-leaf stem blight. In the later period of cotton, green shoots spewed white wadding, and autumn peach covered the top, which is suitable for cotton-growing habits in southern cotton. 4. Excellent fiber quality, white and shiny fiber, sampling in the field, 2.5% span length 29.7mm, specific strength 22.7cN.tex-1, uniformity 49.5%, ring yarn barely 120.7, gas yarn quality 1838.7, primary index Textile quality yarn standards. 5. High output value of lint and significant economic benefit The output of GK19 lint generally exceeds that of conventional cotton by more than 5%, and the grade is 0.3. The value of lint cotton is more than 40 yuan higher than that of conventional cotton per 667 m2; the cost of GK19 against cotton and red bollworm is 667 m2 per 8 m. Around yuan, conventional cotton is between 120-150 yuan; GK19 saves more than 110 yuan per pest per 667m2; plus the output value of lint increases, it increases more than 150 yuan per 667m2; 10,000 mu of GK19 development test piece increases production value 150 More than 10,000 yuan, has obtained higher economic benefits. Cultivation techniques 1. Seed suitable for medium and high-fertilizer, disease-free and irrigated cotton fields can be planted, organic matter and available potassium depleted plots should be heavily applied organic fertilizer and potash; use of refined cotton seed, seed sowing can not be sowed, on-demand 667m2 The next amount of 1.5kg ensures that all seedlings will be broadcast and prevent wasted seeds. 2. The suitable sowing date for the sowing date is April 20-25. When the plastic film is covered, it can be advanced to April 15th. Pure spring cotton and wheat spring cotton are available. 3. The application of base fertilizer, in particular the application of potassium fertilizer to increase organic fertilizer and potash fertilizer is a special requirement of GK19. Before sowing, require more than 2m3 per 667m2 of top soil fertilizer, or 1-1.5m3 of chicken manure or human dung, or 100-150kg of cottonseed cake, 30-50kg of ammonium bicarbonate or 15-20kg of urea, and 75-500g of superphosphate. 100kg or diammonium phosphate 25-30kg (when nitrogen fertilizer is reduced by applying ammonium phosphate), where the soil available potassium is lower than 150X10-6, especially below 110X10-6, pay attention to increase potassium fertilizer, potassium sulfate or Potassium chloride must be applied to 30-40 kg, 1 kg of zinc sulfate and 0.5 kg of borax. 4. Based on fertility, fertilizer and water conditions, reasonably control the number of high-yield fertile lands with high planting conditions and good fertilizer and water conditions, with 667m2 actual harvested number of 2000-2500 strains, average row spacing of 80-85cm, and 17 fruit trees per plant, plant height Control at 120cm. In general medium or upper-middle plots, the number of actual harvested 667m2 plants is about 3,000, with an average row spacing of 80cm, and the number of per plant branches is 14-16, and the plant height is controlled at 90-100cm. The middle and lower territories had 667m2 of 3500-4000 strains with an average spacing of 70-75cm. 5. Timely and reasonably top-dressing and top-dressing with watering time should be appropriately advanced, and urea 15-20kg can be traced twice or once at 667m2 after the budding stage or early flowering stage. In late July to September, in order to prevent the occurrence of red stem blight disease, potassium chloride or potassium sulfate plus urea and potassium dihydrogen phosphate mixture should be sprayed 3-5 times successively, once every 5-7 days. Specific proportion: 30kg water + potassium chloride 0.8kg (or potassium sulfate 1kg) + urea 0.2kg + potassium dihydrogen phosphate 0.3kg. Spray time is better after 3 o'clock in the afternoon. 6. To control insect pests at the right time, scientifically control the control of three generations of bollworms, and prevent or treat them 3-4 times during the hatching period of eggs in the fourth and fifth generations. If pests such as locusts, red spiders, and blind beetles occur, they should be treated in time. According to factors such as growth, weather and density, scientifically control. Other measures are the same as general non-insect-resistant cotton.
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