1, cotton flowering not causes of peach
1.1 sexual degradation or gene mutations
By the domestication of wild cotton cotton on cultivation has adapted to a certain area of relatively good ecological and cultural environment.But if the climate conditions or improper cultivation management, after several years of planting can cause sexual degradation or gene mutations, can appear some atavistic wild traits, such as vegetative branches increased, budding late small bell, etc.
1.2 bad climate influence
Cotton in pollination period in case of continuous high temperature, the drought will intensify cotton boll shedding;Consecutive rainy, forms the waterlogging, also causes the cotton out of green.
1.3 cotton abortive
The main cause of cotton abortive are: (1) the weather factors.According to the survey, when the temperature above 35 ℃, the last a period of time, some cotton varieties pollen development appear deformity, cannot normal pollination abortive.High temperature resistant cotton varieties abortive usually less, not high temperature resistant cotton varieties abortive;Pollen phase of the continuous rain, water burst, can also cause of pollen.(2) the introduction.Due to causes domestic cotton abortive.(3) improper cultivation measures.Lack of fertilizer, affecting the normal development of pollen can't water shortages appear deformity, cannot be normal pollination abortive or part of the cotton density is too large, shade, transparent environment severely malnourished thus affecting the normal development of pollen, the pollination, fertilization to fallen petal fruit drop.
1.4 improper and water management
Excessive nitrogen, lack of trace elements (such as zinc and boron) and excessive moisture, also can cause vegetative growth too strong (main stem growth of 2.5 ~ 3.2 cm), the reproductive growth inhibition, moderate growth, causing cotton leaves can fall off.
1.5 plant diseases and insect pests
Dry cotton verticillium wilt, anthrax, cotton bollworm, thrips, blind bugs like cotton, cotton aphid etc. If not timely prevention and cure can cause a lot of fallen petal green.Specifically in the cotton bollworm large outbreaks of the year, such as plus high temperature weather insect-resistant toxic protein expression, even if the transfer Bt gene cotton also need to strengthen the prevention and control.Caused otherwise, prevention and control of cotton bollworm than cotton cotton boll shedding, sometimes bad.
1.6 applications and inferior cotton
Some farmers lack the corresponding knowledge when specified or covet is cheap, buy fake seeds;Some businessmen sell spring cotton varieties as summer cotton varieties to farmers.These can lead to the development of cotton in the process of cultivation, the phenomenon of the less "or" peach peach.
2, prevent cotton nothing countermeasures of peach blossom
2.1 choose the right variety, strict quality management to breed
A seed management department and the relevant functional departments should strengthen market management, monitoring, to implement related functions, to ensure that the market for qualified seed sales.2 it is cotton to strict quality management of the provenance, manufacturers and distributors in accordance with the relevant state standards and local standards, production, sales, the requirements of the relevant industry guild regulations qualified cotton seeds, from the source to reduce and eliminate due to quality of seed cotton to spend and not real, flower and less real.Third, cotton farmers don't blind introduction, the spring cotton as summer cotton planting, take not high temperature resistant cotton varieties as high temperature resistant varieties.At the same time, the cotton is going to purchase cotton seeds in formal manufacturers, and to ask for bill, specified with sellers even when large amount of purchase and sale contract, learn to use the law to protect their legitimate rights and interests.
2.2 master the scientific planting technology, strengthening cultivation management field
2.2.1 timely seedling, seedling transplanting, reasonable density.The Yellow River basin of spring cotton varieties suitable seeding time of occurrence peak in April to early may commonly, the suitable seeding time of short season cotton varieties in mid to late may;Loose varieties with seedling density of 24000 ~ 33000 plants/hm2, compact varieties for seedling density of 37500 ~ 45000 plants/hm2, key points of different varieties according to the specific varieties cultivation technique.
