The new variety room of the Cotton Research Institute of the Hebei Academy of Agriculture and Forestry Sciences utilizes three interspecific hybrids of seaweed cotton, upland cotton, and wild cotton to be crossed with insect-resistant cotton. The comprehensive performance of Hebei Province in the area of ​​insect-resistant cotton was outstanding. March 1998 passed the approval of the Crop Variety Approval Committee of Hebei Province. It is the first self-fertility variety approved by Hebei Province for insect-resistant cotton. In 1998-2001, the total area of ​​Hebei Province was 1.5 million mu. Features: Plant height 80 cm, stalk hard not lodging, long first fruit section, good permeability, dark green leaves, medium leaves, moderate plant type handsome, oval bell, thin shell, spit flocculation smooth . Good seedling emergence, strong seedlings, stable growth, good precocity, high flowering rate before flowering, growth period 128 days, strong bell strength, large bells, boll weight about 6 grams, uniform upper and middle bell weight, lint percentage About 38%, seed refers to large, early precocious not premature, large yield potential, high resistance to wither, resistance to yellowing, and resistance to cotton bollworm. Production performance: In the two-year regional trials and production trials, a total of 14 trials were conducted, with little production increase and the first year in a row. In 1997 the provincial production test, 4 tests, the average yield of 91.7 kg per mu before lint, compared with the control (Bloom 33B) increased 14.59%, ranking first. Mu yielding 13.4 kilograms of lint cotton, according to the standard cotton calculation, the increase of 187.6 yuan per mu. Miscellaneous 66 In the case of the full-year harvest of the bollworm in 2000, the year of the re-emergence of insects and diseases in 2001 reaped a bumper harvest in the province. The outstanding performance is: good insect resistance, strong disease resistance, no premature aging, upper and middle , The lower part of the bolls was hung in Raoyang in Hengshui, Xianxian in Quzhou, Weixian in Xingtai, and the museum's inspection of pottery by the experts. The yield per acre of seed cotton was generally around 300 kilograms, and the maximum output reached 375-400 kilograms. The good harvest, single boll weight 7.5 grams, 40% clothes, welcomed by cotton farmers. Cultivation points: 1, on the basis of the application of base fertilizer, pouring enough water at the end of the foot, suitable for shallow sowing, promote strong seedlings early hair. 2, sowing time is generally April 20-30 (depending on temperature). 3. Density: About 2,500 water and fertilizer lands, about 4,000 thin and dry lands. 4. Fertilization: Re-apply early flowering fertilizers, and no later than August 10th, apply top dressing fertilizer again. Pest control principles: 1. Bt cotton is resistant only to cotton bollworms and other insect pests of the order Pyralidae. It is not effective against cotton aphids, cotton spiders and other pests. It should be controlled in time according to the occurrence. 2. Insect-resistant cotton is by no means without chemical control, and insect pest monitoring should be enhanced. Generally, the second-generation cotton bollworm has more than 20 young larvae of 100 strains, or when the rate of damage to the bells and the top of the bolls reaches 5%, the appropriate planting areas should be controlled in time: Adapt to planting in diseased, disease-free and Yellow River basin areas in southern central Hebei and Heilonggang.
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