MySheen

Chemical control technology of beans in greenhouse

Published: 2024-11-09 Author: mysheen
Last Updated: 2024/11/09, Spraying should adhere to the principle of treating buds mainly and kill the larvae in buds during flowering. The best time to spray is when the bud is open from 8 am to 10:00 on a sunny day. Spraying the pod more than 10 cm long after flowering can kill the newly hatched larvae and the low instar larvae that enter the young pods. The medicine can choose kungfu 1500 times solution, or avermectin 150.

The cultivation of beans in greenhouse with chemical control technology can regulate the growth and development of plants, increase flowers and protect pods, and increase yield. 1. Control plant type. After emergence, spraying gibberellin with 10 mg / L gibberellin every 5 days for 3 times could make its stem node elongate, branch increase, blossom and pod earlier, and harvest time 3-5 days earlier. Spraying dwarf and paclobutrazol in the middle growth stage of lentil, quarter bean and edamame bean can control plant height, reduce canopy closure and reduce the occurrence of diseases and insect pests. The general concentrations are as follows: 20 mg / L of dwarftin and 150 mg / L of paclobutrazol, and 100 mg / L triiodobenzoic acid can be used to control the plant height and increase the yield of edamame bean. 2. Promote regeneration. In the later growth stage of cowpea and lentil, in order to promote their germination, the seeds can be sprayed with 20 mg / L gibberellin solution, usually once every 5 days and twice. 3. Reduce shedding. The temperature of flowering and podding is too high and too low will increase the drop of flowers and pods of legume vegetables. Spraying 5mg / L naphthylacetic acid or 6mg / L p-chlorophenoxyacetic acid or 12mg / L gibberellin at the flowering stage of string beans and lentils could reduce the flowers and pods of the above-mentioned crops and mature earlier. Due to the increase in the number of pods, it is necessary to apply more fertilizer in order to achieve high yield. 4. Inhibit photorespiration. Photorespiration of crops will consume a lot of assimilating substances, and inhibition of photorespiration of crops can greatly increase crop yield. Sodium bisulfite is an inhibitor of photorespiration in legume crops. It is suitable to use sodium bisulfite from flowering stage to podding stage. If the plant growth is weak, it can be used in advance to the flowering stage. The concentration of sodium bisulfite on kidney bean and cowpea was 30mg / L, and the period of use was from early flowering to full flowering.

 
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