The main cause of flower seedlings roots rotted life and death
1. The poor quality of seeds.The seeds of peanut seed quality is poor, especially the mildew is a major cause of lead to flowers and seedlings roots rotted.
2. Sowing too early or too deep.Early sowing, ground temperature is low, seed enzyme activity, breathing is abate, peanut bud emergence is slow, sowing too deep for a prolonged soil reduces seed disease-resistant ability, increases the chances of seed infected, prone seedlings roots rotted life and death.According to the survey, the field of seedling phenomenon, early sowing deep planting field significantly heavier than late sowing shallow planting field.
3. Continuous cropping.Peanut continuous cropping soil accumulation of pathogenic bacteria and insects, insect and base.Unused fungicide seed or seed of pesticides to plot often occur, it is the leading cause of death seedlings roots rotted and a major reason.
4. Improper drug fertilizer use.Use chemical fertilizers, not rotten manure, chemical pesticides, such as direct contact with the seeds or usage is too big, easy cause burning LanZhong;Herbicide use too much or make partial quantity is too large, with uneven spraying or preceding using herbicide residues can cause seedling phytotoxicity miao huang death.
Flowers and seedlings roots rotted prevention measures
1. Choose the high quality seeds
Whether to buy or take the seed, want to choose pod full, kind of prominent, nut shell white, no mildew upon high quality varieties, nut shell yellow black with disease spot of pods cannot be used as a fruitcake.
2. Good seed processing
After selecting seeds sown fruitcake in one months to half a month before 2 ~ 3 days, then shell, LiXuan grading, eliminate disease kernel, the kernel, abortive kernel.When planting, with special sterilization of peanut indicated, such as high as + blasts, FengQia suit or with other specialized agents such as coating.Experiment shows that with a good yield increased by 15% ~ 20%, and indicated the general peanut after emergence, root rot significantly reduce.The other strip from seedling stage than not bask in the sun before 1 day earlier, five days ahead of time from the emergence stage, an average 9.1% increase;Pod shell 10 days before the time is right seeding, peeling the night, the seed vigor stronger, the key strong emergence.
3. Increasing bacterial manure application, careful with herbicides
Fields to be careful, to ensure that the flat land, no big KeLa, continuous cropping serious plot had better use some researches over the land.To a separate seed manure fertilizer use, prevent burning.Uniform water wants enough, sowing depth to agree, with 3 centimeters advisable, turns the soil is tight.
Peanut field weed control, the use of herbicides should be applied in strict accordance with the specifications, not to increase the dose or expand the application range.After wheat peanut, wheat herbicide should be applied before the winter, as far as possible choose compound with herbicide, avoid adr peanut varieties of a single herbicide dosage is too large.Avoid applying contains a short cycling, chlorine cycling phase residual effect of herbicide, etc.Spraying herbicide wants even, can't leak spray or spray.Herbicide to pay close attention to the change of weather, temperature, avoid these adverse factors causing phytotoxicity.Spray equipment to clean and buy normal manufacturer production of herbicides.Peanut adr is lighter, measures should be taken, using fertilizer, foliar fertilizer, comprehensive measures such as spraying auxin and application of antidote.If the adr is too serious, suggest to switch to other crops.
4. After seedling management in a timely manner
In most seed emergence, such as found that some not emergence of acupuncture point, can have dug check the seeds rot or not emergence.If can be emergence, find out the reason, improve seed emergence conditions;Such as have not emergence, should timely sprouting reseed.
5. Control
With FengQia confirmed 600 ~ 800 times liquid or 50% carbendazim WP1000 times liquid or 70% methyl sulfur bacteria spirit WP800 ~ 1000 times or copper hydroxide + 70% mancozeb, 30% according to 1:1 blending into 1000 times liquid.Got wet to the root of spray in the early onset, severe block 7 ~ 10 days between 2 ~ 3 times.
