Core Tip: From the time spent on flowers until after bagging, it is usually about 3 times. The correct drug selection at this stage is very important. It can effectively overcome the problem of black spots, fruit rust and cracks caused by improper use of the drug.
First, before bagging agent selection:
From the time of thanking the flower until the bagging is generally used about 3 times, the correct drug selection is very important during this period, which can effectively overcome the problem of black spots, fruit rust, cracks and other rough surface caused by improper use of drugs. The following principles should be followed during specific drug use:
(1) Fine particle size, good suspension rate, safe powder or water sterilizing insecticide should be selected, such as Penco, Ethyl, Polaroid, Kecong, Thiophanate, Carbendazim, and Sterilization. (2) Try not to choose the coarse particles, poor suspension agent, such as domestic mancozeb, eutectic, Fumei double and so on. (3) Do not use peculiar or sulphur-containing compound, such as sulfur or compound carbendazim. (4) Do not mix various synergists when spraying. (5) Use creams with caution. Try not to choose the EC formulation. Use it at a high dilution as described. (6) Do not use Bordeaux mixture and other copper-containing preparations. (7) Combine sprays with calcium-containing complexes or calcium chelaters with high calcium content, such as Ralphinib and amino acid chelating calcium-zinc-iron, spraying 3 times before bagging.
Second, several issues that should be noted in bagging:
(1) Paper bag selection: Apple and peach should choose double-layer paper bags with good shading, good permeability, strong resistance to pull, anti-aging, and fine workmanship; grapes should be selected from paper bags with white, strong pull resistance and moderate waxiness. (2) Bagging time: Red Fuji apples should be bagged at about the end of May, that is, from the end of May to the beginning of June, and the Zhonghua Peach should be bagged in mid-June. Red grape should be bagged when the size of soybeans is the size of the fruit. . (3) Bagging should be carried out at intervals of about 2 days after spraying to reduce the hazard of the medicine on the fruit surface. (4) Try to make the vent hole of the fruit bag upward, so as to facilitate heat release and reduce sunburn and fruit rust. (5) Vents should be open and tight.
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