How to produce pollution-free fruits

With China's accession to the WTO, improving the quality of fruit has been placed in an increasingly important position. So, what kind of technical regulations can be used to produce pollution-free fruit? This reporter interviewed relevant experts. In the following, the production of peaches and grapes is taken as an example to describe briefly: To develop grapes, the seedlings must be disinfected prior to planting. Commonly used disinfectants include 3 to 5 Baume degrees of lime sulfur or 1% copper sulfate. The fertilizers that are allowed to be applied are classified into organic fertilizers, microbial fertilizers, chemical fertilizers, and foliar fertilizers. Among them, chemical fertilizers include nitrogen fertilizers, phosphate fertilizers, potash fertilizers, sulfur fertilizers, calcium fertilizers, magnesium fertilizers, and compound (mixed) fertilizers. Foliar fertilizers include a large number of elements, trace elements, amino acids, and humic acids. To limit the use of nitrogen fertilizers, limit the use of chlorine-containing compound fertilizers. The bagging should be carried out as early as possible after fruit thinning, but it is necessary to avoid the hot weather after the rain. The bagging time should not be too late. Before the bagging, the fungicide should be sprayed all over the garden. Red grape varieties need to be picked 10 to 20 days before harvesting. For the coloring and colorless varieties, as well as the heavily colored Northwest region, it is not necessary to take bags and harvest them with bags. To avoid high-temperature damage, do not remove the paper bag at one time when picking the bag. Open the bag bottom and gradually remove the bag. In the process of controlling pests and diseases, it is forbidden to use highly toxic, highly toxic and high residual pesticides such as BHC and DDT, and to promote the use of mineral-originated pesticides, microorganisms and botanical pesticides. The commonly used mineral sources include Bordeaux fluid, copper hydroxide and copper rosinate. In terms of the use of plant growth regulators, gibberellin is allowed to be used in the induction of non-nuclear fruit, promotion of enlargement of seedless grapes, elongation of the ear, and the like. To develop peaches, the soil texture should be sandy loam, and the pH value can be adjusted from 4.5 to 7.5, but it is appropriate to use 5.5 to 6.5 slightly acidic. It is forbidden to use non-hazardous municipal waste or garbage containing heavy metals, rubber, and hazardous substances as fertilizer, and to control the use of chlorinated fertilizers and chlorine-containing compound fertilizers. After the fruit is set, it is timely bagged, and a fungicide and insecticide should be sprayed before the bagging. The bagging sequence is first precooked and then later-maturing, and the low-fruit-rate variety can be set late to reduce the empty bag rate. Methods for controlling peach pests and diseases include physical control, biological control, and chemical control. Based on the biological characteristics of pests and diseases, pests and insects should be hunted using methods such as sweet and sour liquid, black light, trunk-wrapped grass, adhesives, and insect nets; insect pests can also be protected by natural enemies such as ladybugs, grasshoppers, and predators. The use of beneficial microorganisms or their metabolites, such as the use of insect sex hormones. If chemical control is used, biogenic pesticides and mineral-based pesticides (such as lime sulfur and sulfur suspension) may be promoted depending on the biological characteristics of the subject and the characteristics of the damage. Use of highly toxic, highly toxic, high-residue and teratogenic substances is prohibited. Carcinogenic, mutagenic pesticides. The use of chemical pesticides must be strictly in accordance with the relevant requirements to control the amount of application and safety intervals.

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