Planting skills: when is the better time to bag pears? How to cover the bag? How to choose a fruit bag?

The biggest advantage of fruit bagging is to improve the appearance quality and reduce pesticide residues, which is a necessary supporting measure for the development of our fruit industry. When is the better time to bag the pear? How to cover the bag? How to choose a fruit bag?

When is the best time to bag pears?

Pear bagging can obviously improve fruit appearance quality, prevent diseases and insect pests, reduce pesticide pollution residues, improve fruit flavor and improve fruit quality. At the same time, it can also meet the market demand for high-grade fruit. Bagging cultivation has become an important technology for the production of high-quality and high-grade fruits.

1. Time for bagging pears. 20-40 days after falling flower, the bagging time should be within 20mm of the fruit transverse diameter, and the fruit spot should not occur or rarely occur. Before bagging, the fruit should be carefully thinned according to the load. Bag the fruit after thinning, and it will end in about 10 days. Too early or too late can not achieve the desired effect.

2. Kill insects and sterilize pears before bagging. Pear trees after Xiehua combined with bagging must be sprayed with insecticidal and germicidal mixture for 1-2 times, focusing on spraying fruit noodles to kill the bacteria and insects on the fruit surface. The main targets are pear brown spot, black spot, ring streak, pear gall midge, pear yellow powder aphid, pear planthopper and so on. Triadimefon plus fungicide and insecticide can be used.

How do you bag pears?

1. When bagging, the fruit should be selected strictly. Choose strong fruit, big fruit and side fruit with long fruit shape and closed calyx. Get rid of disease and insect weak fruit, branch fruit, secondary fruit, each bag only 1 fruit, 1 fruit 1 bag, not 1 bag of double fruit.

2. The order and requirements of bagging pears. First up the tree and then under the tree, on the contrary, easy to fall, the upper and lower sides should be evenly distributed inside and outside.

3. The operation method of bagging pears. 20cm × 15cm composite paper bag with gray outside and black inside is selected for bagging. Paper bags can not be made of paper paste, because the newspaper bags contain too much lead, which increases the pollution to the fruit. First put the hand into the bag to make the whole bag expand, then grasp the fruit handle with one hand, hold the bottom of the bag with the other, put the young fruit into the middle of the bag mouth, and then fold the bag mouth from both sides to the middle fruit stalk; when all the bag mouth folds to the fruit handle, on the left side of the bag mouth, tear down to the length of the bag mouth wire card, finally turn the wire card 90 degrees, bend and tie it tightly on the fruit handle. Be careful not to tie it to the fruit platform branch, and do not tie it too hard, so as to prevent the fruit stalk from getting stuck and affecting its growth. After the cover is finished, use your hand to hold up and hit the middle of the bottom of the bag to inflate the whole bag. The young fruit is suspended in the bag and does not attach to the bag wall, which can prevent the fruit from rust and mildew caused by stinging fruit and medicine, fungus and insect secretions.

4. Points for attention after bagging pears. Bagging cultivation of pear trees is inseparable from good fertilizer management and pest control. After the fruit bagging of the pear orchard was completed, the fruit expansion fertilizer should be applied timely, mainly organic fertilizer.

Do a good job in the prevention of pear ring disease and the control of pear net bug, the appropriate period of application: early June. Control agents: ① 80% Dasheng 500x solution + lightning kill 1000 times solution + 0.2% potassium dihydrogen phosphate; ② 25% Metalaxyl 1000 times solution + 65% Dysen zinc 500x solution + conventional piercing mouthparts insecticide. In orchards with serious pear rust, 1000 triadimefon was added to the above formula.

How to choose a pear bag?

1. To choose large-scale and trustworthy paper bag manufacturers, there should be registered trademarks.

2. Pay attention to the quality of the paper bag, the paper should be soft and breathable, wind and rain resistant, the bottom of the bag should be glued well, the thread should be firmly tied, the workmanship should be fine, the water resistance, shading, waxing should be good and the wax is evenly coated.

3. Pay attention to the specification of the paper bag. It is not suitable to be too big or too small. The size and type of the fruit bag should be determined according to the variety, the specifications of the bag are usually 160*198mm, 170*210mm, 180*220mm, there is a half round gap in the middle of the bag mouth, which is easy to open the paper bag, and there are air holes on both sides of the bottom of the bag to facilitate the outflow of Rain Water to avoid stagnant water in the bag.

4, can not use the newspaper self-made fruit bag, can not withstand the wind and rain, almost no effect; newspaper ink contains lead, but also will pollute the fruit. At the same time, the waste bags used in the first year can no longer be used because the wax effect has become invalid.