Planting Technology Lists
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cotton seedling anthracnose
Symptoms can occur in seedling stage and adult plant stage. After seedling stage, the disease can cause seed rot before germination; after emergence, reddish brown crack spots occur at the base of stem, expanding contraction causes seedling death. Orange slime (conidia) is produced on the spots when wet. The cotyledon edge appears round or semicircular chloasma, after drying off the cotyledon edge incomplete. Cotton bolls were dark red spots in the early stage of infection, brown spots after expansion, depression of the disease, orange powder that is, conidia. Serious when the whole bell rot, can not crack, fibers become black
2019-01-16 -
cotton seedling red rot
Symptoms occur in all cotton areas of China, the Yangtze River Basin, the Yellow River Basin cotton areas suffer heavily, Liaohe River Basin also occurs. Both seedling stage and boll stage can be infected. Infected seedlings are damaged before emergence, and the buds turn reddish brown and rot. After being unearthed, the roots and lateral roots of the injured cotton seedlings turned yellow and then black and brown and rotted. Infected young stem vessel turns dark brown, near the ground young stem base appears yellow streak, then brown rot, young roots, young stems swelling, cotyledons, true leaf edge produces gray-red irregular spots, humidity is high when it produces pink mold layer, that is, pathogen
2019-01-16 -
Cotton boll aspergillosis
Symptoms occurred in all cotton areas. It mainly harms cotton bolls. At first, water-immersed yellow-brown spots are produced at the cracks, wormholes, wounds or cracks of cotton bolls, and then yellowish-green or yellow-brown powders are produced, which fill the cracks of cotton bolls, resulting in abnormal cracking of cotton bolls and yellowish-green villous mildew, that is, conidiophores and conidia of pathogens, and the quality of cotton wool is polluted or dry-rot deteriorated to varying degrees. Pathogen AspergillusflavusLink is called Aspergillus flavus and Aspergillu.
2019-01-16 -
Cotton boll red rot
Symptoms of cotton boll infected with the initial amorphous disease spot, in wet weather or continuous rain, the disease spread rapidly, throughout the whole boll, some spread to the cotton fiber, producing a uniform pink or light red mildew layer, easy to stick together after rain, become a pink lump, resulting in the disease boll can not crack, cotton fiber rot into a rigid petal, seed infection, the germination rate decreased. The pathogen is the same as cotton seedling red rot. The route of transmission and the conditions of the disease are weak parasitic bacteria, which can not directly infect cotton boll, mainly caused by wound invasion, cotton boll corner spot.
2019-01-16 -
Stem blight of cotton
The symptoms were more serious in the northeast cotton area, the Yellow River basin, the Yangtze River basin, along the river and coastal cotton areas. The disease occurred in the whole growth period of cotton, and the damage was serious in seedling stage and bud stage. Cotyledons and true leaves were infected with purplish red at the primary edge and small gray round spots in the middle, and the later spots expanded or fused into irregular spots. Some concentric wheel lines appear in the center of the disease spot, on which there are small black dots, that is, the conidium of the pathogen. The diseased part is often broken and scattered, and when the humidity is high, the young leaves appear water-immersed disease spots, and then expand as quickly as boiling water.
2019-01-16 -
Prevention and control of cotton blind Toona sinensis
The occurrence of blind stink bug is very sensitive to the ecological environment. The blind Toona sinensis likes the temperature of 25 ℃ ~ 30 ℃ and the relative humidity of 80% to 90%. The recent wet weather is very beneficial to the occurrence of the blind Toona sinensis. The planting of flower arrangement in cotton field is also beneficial to the parasitism and transfer of Toona sinensis. Now, soybeans, broad beans and other vegetables are interspersed in cotton fields, which is beneficial to their reproduction. Therefore, some cotton farmers in Hanchuan, Yunmeng and other counties and cities in Hubei Province have recently revealed the occurrence and harm of blind stink bugs.
2019-01-16 -
Key Technical points of Cotton Boll period Management
The period from cotton flowering to boll maturity is called flowering and boll stage. In general, from the first ten days of July to the beginning of September, the growth of cotton in flower and boll stage is still vegetative growth and reproductive growth at the same time, but gradually shifted from vegetative growth to reproductive growth. The main direction of this period is to add three peaches. Its management technology mainly includes five aspects. The main results are as follows: 1. re-apply flower and boll fertilizer and cover fertilizer. The fertilization time is applied when two bolls are sitting in the lower part of the cotton plant at full flowering stage, and the standard nitrogen is 10kg / mu and 15kg / mu. If the soil fertility is poor, the cotton plant grows weakly and the soil.
2019-01-16 -
How to produce good seedlings of improved Cotton varieties
Now, nutrition bowl is used to raise seedlings in most cotton areas of our country. Generally evaluate whether the emergence of cotton seed is good or poor, one should see the seedling rate, and the other should be regarded as the seedling rate. The reason for the low emergence rate is that in some cotton species, the proportion of autumn peach or late autumn peach is too large, which reduces the germination rate. However, the germination rate of peach or mid-flower selected as seeds is more than 80%; second, in the process of cotton seed processing, the broken seeds exceed the standard; third, before or after sowing, the soil and soil are not disinfected with medicament. or the selected disinfectant is not the right way; fourth, cotton seed this year.
2019-01-16 -
Cotton improved variety Xinqiu No. 2
Characteristics: the growth period of spring sowing in the Yellow River valley was 120 days, the seedling emergence was late, the seedling growth was weak, the growth was strong in the middle stage, the growth became weak in the later stage, and the leaf function was general. The plant type is compact, the plant height is 100 cm, the leaf is medium size and dark green, the first fruit branch is 7.5 nodes, there are 17.6 bolls per plant, the bolls are oval, the bolls are smooth, the single boll weight is 6.0 grams, the lint percentage is 41.6%, the seed finger is 10.1 grams, and the flowering rate before frost is 96.5%. Resistant to Fusarium wilt, Verticillium wilt and cotton bollworm; HV
2019-01-16 -
A New Cotton Variety-Shannong Shengza 3
Shannong Shengza No. 3 (approval No.: Guoshanmian 20007006) breeding unit: Shandong Agricultural University, Shandong Shengfeng seed Industry Science and Technology Co., Ltd. Characteristics: transgenic insect-resistant gene mid-mature hybrid varieties, the growth period of spring sowing in the Yellow River valley is 122days. The plant is loose, the plant height is 100.4 cm, the boll per plant is 17.3, the boll is oval, the bell shell is thin, the boll is smooth and concentrated, the single boll weight is 6.3g, the lint percentage is 40.0%, the seed finger is 11.5g, and the pre-frost flowering rate is 94.1%. Resistant to Fusarium wilt and Verticillium wilt
2019-01-16