A new product of cotton-Demian 800f1
Demian 800F1, a breeding unit, is a new hybrid cotton variety with high yield, high quality and multi-resistance developed exclusively by Denong Zhengcheng seed Industry Co., Ltd. It was approved by Anhui Province in 2005.
The whole growth period of this variety is about 134 days, which is a medium-ripe variety; plant tower type, strong growth, strong boll setting, big peach, thin boll shell, smooth boll opening, easy to pick, good cotton fiber quality, lint percentage 42.1%. High resistance to cotton bollworm and red bollworm; high resistance to Fusarium wilt, resistance to Verticillium wilt, three peaches knot, resistance to high temperature and drought, not premature senescence, strong stress resistance; pre-frost flowering rate 86.5%. High yield and good stability. Participated in the cotton variety regional test in Anhui Province from 2003 to 2004, the average seed cotton and lint yield increased by 20.35% and 20.1% respectively compared with the control Wanza 40F1, ranking first.
In the cultivation technique, the seedlings were raised in a nutrient bowl. The seedlings were sown when the temperature was stable at 15 ℃ in the middle of April and transplanted in the middle of May. The density is 1600 ~ 1800 plants per mu, pay attention to enlarge the row spacing and cultivate the soil. Apply more organic fertilizer and more phosphorus and potassium fertilizer. Reasonable chemical control: use zhuangsu for many times about 10 days after blooming, blooming and topping, pay attention to grasp the principle of being light in front and heavy behind, and shape the type of medium-strong plant.
Pest control pay attention to the control of cotton aphids, red spiders, Spodoptera litura and other pests.
Note that the offspring of this variety cannot be reserved for seed use. Seed coating agent composition: 16% thiram, coated seeds and seedlings are poisonous, should pay attention to safety.
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Leaf blight of cotton
The symptom is also known as Cercospora leaf spot of cotton. It is mainly harmful to leaves. Most of the cotton infected in the late growth stage, at first produced many dark red dots on the leaves, and then expanded into nearly round, purplish red on the edge, slightly raised, brown in the middle, and produced a white mildew layer under wet conditions, that is, the conidiophores and conidia of the pathogen. The damaged leaves are easy to break. The pathogen Mycosphaerellagossypina (Cooke) Earle is called Gossypium, which belongs to ascomycetes subphylum fungi. Ascospores globular black, ascospores
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The new cotton product "Hanmian 685" has passed the examination and approval.
Hanmian 685, a new transgenic insect-resistant cotton variety bred by Handan Academy of Agricultural Sciences (postcode: 056001, telephone: 0310-8161725), recently passed the variety approval of Hebei Province. The growth period of this variety is 140 days, with 14.7 bolls per plant, boll weight 5.8 grams and seed index 10.75 grams. 40% of clothes. The flowering rate before frost is 82.25%. Resistant to cotton bollworm, red bollworm and other Lepidoptera pests. High resistance to Fusarium wilt and resistance to Verticillium wilt. Micronaire value 4.5, stronger than
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