(1) The pre-harvest treatment method is mostly treated with Qingxin (MH). 2~3 weeks before potato harvesting, use l00~2500ppm fresh green pigment as foliar spray (the specific time and dosage should be determined according to the variety characteristics and growth potential, the growth rate is high and the dose that is not resistant to storage is slightly higher, otherwise it is slightly lower) It can inhibit post-harvest germination and prolong storage time. If pre-harvest treatment combined with appropriate low temperature storage is more effective.
In addition, spraying with 500-1000ppm 2,4,5,-7 foliar sprays for a week prior to harvesting also prolongs the storage period of potatoes. Treatment with 2,4-D and naphthylacetic acid has a certain effect, but these agents are on tubers. There are side effects that make the quality after storage poor, and the application is not as widespread. After pre-harvest treatment, the sprouting ability of the tubers on the tubers is weak and they are finely drawn. Most of them cannot grow into normal plants, so they are not suitable for planting.
(2) Postharvest treatment The use of methylnaphthaleneacetate (ME-NA) to treat postharvest storage of potatoes to prolong their dormancy and shelf life is one of the most successful examples of plant growth regulators used in production. Today, millions of tons of potatoes in the world are kept in this way. There are two ways to use them. One is to mix naphthalene acetic acid methyl ester with fine soil and other fillers, and then mix it into the potato heap two months after picking. Dosage: 200 ~ 500 g / 10000 kilograms of potato chips. The second is to dissolve the methyl naphthaleneacetate after it is dissolved on the paper scraps and mix it with the potato chips. Both treatment methods should be stored in a closed container after treatment to facilitate the action of methyl naphthylacetate on the buds, interfere with cell division, and then inhibit germination. However, the treated tubers should be placed in ventilated place for a few days before use to allow the naphthylacetate to evaporate and remove the poison.
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