In 2016, in the production of sweet potato in Hebei and Beijing suburbs, it was found that corn plantings were planted in the upper sorghum, and the growth of leaves and roots occurred to varying degrees. Joint plant protection and chemical control experts analyzed: mainly due to excessive application of “nicotinic acid "The phytotoxicity of corn herbicides on sweet potatoes, the following solutions are proposed for this problem:
1. Pour enough water to make the roots absorb a large amount of water to reduce the concentration of herbicides in the plants. In combination with watering, fertilizers such as ammonium bicarbonate, ammonium nitrate or urea are added to promote root growth. It is also possible to spray 1% to 2% of urea solution or 0.2% to 0.3% of potassium dihydrogen phosphate solution or Huimanfeng 600 to 800 times solution.
2, spraying Bi-protection, gibberellin, detoxification, Yunda-120 (natural brassinolide) diluted 1500 times, gibberellin plus 1% urea aqueous solution or use, leaf noodles, etc., can promote victimization Plants recover as soon as possible.
3, timely cultivating, enhance soil aeration.
4. Promptly control pests and diseases and enhance the growth.
If the above measures are taken to alleviate the symptoms of phytotoxicity, it should be destroyed or replanted as soon as possible.
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