There are individual farmers who do not cut into pieces and do not cut and germinate. They only cut pieces when sowing. Due to inconsistent sprouting and long time in the field, there are many opportunities for infestation of soil-borne fungi and underground pests, resulting in inconsistent emergence. The prevention method is cutting and germination.

The size of the potato and potato tuber, especially the digging eyes and the apical dominance, are different due to inconsistent germination, emergence, and nutritional status, resulting in uneven emergence. The prevention method is to cut the potatoes to about 25 grams, and separate sowing of large potatoes and germination.

The harmfulness of the underground pests to the underground pests is weak or not controlled, causing the underground pests to bite the potato shoots or eat the potato meat and infect the soil bacteria, resulting in uneven emergence. The prevention method is to use 2 kg of carbofuran granules per mu or 50% of phoxim 200 g of water to add 2 kg of water and 25 kg of mixed soil to spread the sowing soil into the sowing ditch at the time of sowing.

Seed diseases such as black neck disease, ring rot, late blight, etc., seed potatoes can not emerge and rotten in the soil or grow sick, weak seedlings. The prevention method is to introduce the disease-free zone, leave the disease-free field to keep the seed, and stop the diseased seed potato from entering the field. Before the cutting, the seeds will be sunned for 2 days. The cutters will be sterilized strictly after cutting, and the pesticides will be soaked after cutting. In the process of seed purchase, slicing, germination and sowing, diseased, rotted, malformed and seedlings with early or no sprouts and weak sprouts were excluded.

When the seed soaked with gibberellin and bactericide is soaked, the concentration is too large and the time is too long to be easy to produce phytotoxicity, affecting the emergence of seedlings. The prevention method is to strictly limit the concentration and the time of the soaking of pesticides. Do not arbitrarily increase the concentration and extend the time. If soaking the seeds, the cuttings should be slightly larger. The bud dormancy should stay in the middle of the cuttings as much as possible. Times.

The fertilizers and fertilizers are too close to the seed blocks, especially if they are covered with nutrients, and the seed fertilizers are more susceptible to phytotoxicity. The prevention method is to apply the core fertilizer to the bottom of the ridge or slightly deeper in the middle of the two small rows. The seed fertilizer should be applied between the seed blocks and the amount should be smaller.

Prior to the sowing of the herbicide, the concentration of the herbicide such as Pyrenean was too large or uneven. The prevention method is to use the product according to the required concentration and dosage, so as to avoid leakage and re-spray, and the spraying shall be uniform and thoughtful.

Poor sowing when planting is inconsistent with the depth of soil. Poor sowing when planting, relying on days of rain or drought to a certain extent and then watering, emergence are uneven. The prevention method is: If there is a lack of sensibility, it is necessary to make a sowing and sowing. The sowing and sowing should be consistent with the depth.

The film was damaged in the early stage of emergence, resulting in differences in soil temperature and humidity, resulting in uneven emergence. The prevention method is to promptly wet the fine soil when the film is damaged.

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