How to prevent and cure the drug damage of Schisandra chinensis

In recent years, the chemical harm of a large number of Schisandra chinensis plants planted in various places has occurred from time to time, the light ones reduced the yield, and the heavy ones caused the total yield and harvest in the whole garden, which should be paid enough attention to.

The common acute drug damage of Schisandra chinensis is mainly caused by improper application and pesticide drift. The drug damage of Schisandra chinensis caused by pesticide drift is mainly caused by the use of 2mae 4muryl D herbicide in corn and wheat fields. Wu Zhongsheng planted 100 mu of Schisandra chinensis in Xiagou Village, Wangshi Town, Haicheng City, and suffered drug damage caused by the drift of 2meme 4muryl D butyl ester, resulting in the total yield and harvest of the whole garden that year. Schisandra schisandrae is very sensitive to the herbicide 2mae4 murine D butyl ester, and acute drug damage occurs quickly, resulting in wilting, leaf curling, flower drop, fruit drop, green loss, slow growth, postponement of growth period, death of severe plants and great loss of farmers' cultivation. The following measures can be taken to prevent and control this kind of drug damage.

Scientific selection of herbicides to avoid herbicide damage

Introduce and screen other safe and efficient herbicides to replace 2mai 4murD butyl ester. The active use of safe herbicides can not only achieve the ideal herbicide effect, but also not easily produce drug damage. You can choose the current promotion of Hanfengbao and so on. At the same time, a 200-meter isolation zone is preset around the Schisandra base. It is worth noting that the use of pharmaceutical equipment by some farmers is quite chaotic, and the cleaning of pharmaceutical equipment is not thorough. Sprayers that have used 2meme 4murd butyl ester have not been thoroughly cleaned, and continued spraying with fungicides often causes "secondary drug damage" to Schisandra chinensis. There are also farmers who do not wear a protective cover on the sprayer head when spraying 2mam 4murd butyl ester, the position of the sprayer head is too high from the ground, the pressure of the liquid pump is too high, and the droplets volatilize or drift, causing drug damage. The investigation shows that 50% of the death of Schisandra chinensis seedlings in production is caused by herbicides, which must be paid attention to.

II. Remedial measures for drug damage

In general, after the occurrence of drug damage caused by Schisandra chinensis, 1-2% urea, 0.3% potassium dihydrogen phosphate and other quick-acting fertilizers can be sprayed on the leaves to promote growth and improve drug resistance; 0.1% brassinolide 20-40 ml per mu can also be used to spray 50 kg of water; in serious cases, 85% gibberellin crystal powder 20 mg / kg should be added to remedy. Among them, gibberellin should pay attention to its dosage form when using, water-soluble ones can be diluted directly to water, and it is forbidden to dissolve with alcohol or liquor, while non-water-soluble ones must be dissolved with a small amount of alcohol or 60-degree liquor and then diluted with water before use.

III. Chronic drug damage

It is mainly caused by the accumulation of pesticide residues in soil or plants caused by repeated or successive years of pesticide application. The symptoms of chronic drug injury are not obvious, which can only be judged by the comparison of normal plants, but the yield and quality are seriously affected. Before the cultivation or seedling of Schisandra chinensis, if the previous crops have used herbicides, "Wotuan" can be used to degrade the residual pesticides in the soil. Usage and dosage: "Wotuan" was used to treat the soil during farmland leisure, at this time, water was added 2000 times to 750g per mu, stirred evenly and fully dissolved, the ground was evenly sprayed with sprinkler irrigation equipment, and then ploughed for leisure, so that pesticide residues can be fully degraded. Then, a few days before sowing or planting, fully dissolve with "Wotuan" 750g and 2000 times of water per mu, spray the surface of the seedling bed or planting belt, and then sow or transplant. Note that "Wotuan" should be mixed with acid pesticides, should not be foliar sprayed, and should be sealed and kept away from light.