The second citrus fruit drop will effectively prevent you from having to do this

Citrus physiological fruit drop is usually twice: once in the middle and late May with the sessile fruit, mainly incomplete flowering, unfertilized flowers or incomplete fertilization; the second is from early June to July. Contradictory results of fruits, the formation of a second physiological fruit drop. There were too many rainy days in the early part of this year. The first physiological drop was serious. To preserve citrus production, measures should be taken to prevent secondary physiological fruit drop.

Strengthen water and fertilizer management

Grab the current period until the critical period of mid-July, and apply topdressing and stable fruit fertilizers appropriately. Before releasing autumn shoots, apply a strong fruit fertilizer with nitrogen, phosphorus, and potassium as the main ingredient. Strong fruit fertilizer should account for 30% to 50% of the total annual fertilization, and the fertilizer type is preferably organic fertilizer, fermented cake fertilizer or livestock and poultry fertilizer, and biogas residue liquid.

Immediately fill the soil with water after fertilization, and pay attention to soil and fertilizer. General strains produce 25 to 50 kilograms of the resulting tree, can be applied 250 to 300 grams of nitrogen, 100 to 150 grams of phosphorus pentoxide, 150 to 200 grams of potassium oxide. When applying fertilizer, if it encounters dry weather, it may cause fruit drop. For this reason, if it does not rain for 10 to 15 days, it should be promptly filled with water, and at the same time, cover the tree disk to maintain the topsoil humidity and temperature. If after this period of long-term rain or heavy rain, we must pay attention to exclude waterlogging.

Timely erasure of summer shoots

When the summer shoots are found, they must be thoroughly wiped out in time, especially when the drought occurs, the excessive shoots on the outside of the canopy should be wiped out to reduce the water transpiration and nutrient loss of the tree and make more moisture and nutrients. Conveyed to the fruit. In addition to artificial wipes except for some areas, the use of drugs to remove the tip, the effect is also good. Generally, 25% of Qingxin is used to adjust the amount of P from 100 to 120 times or from 500 to 700 times. Due to the high temperature and high humidity in the summer, the summer shoots are quickly drawn. Therefore, during summer shoots, spraying once every 20 days, and even spraying 2 to 3 times, the effect is better.

Pest control

There are many pests and diseases that affect the physiological fruiting of citrus, such as leaf roller moths, red spiders, rust spiders, scale insects, and other pests. If they are found, they should be immediately controlled. In June, citrus larvae, whiteflies and other larvae hatched and were sprayed with 18 to 20 times of rosin mixture or 200 to 300 times of detergent diesel oil emulsion, or 40% speed culling or 20% of cracks. Emulsion 2000 ~ 3000 times liquid control, and can also treat lant coal disease. At present, the red (yellow) spiders are in their peak period. Observe the new leaves of spring shoots that are harvested this year. When there are about 10 spider mites per leaf, they are immediately sprayed with 2000-250 times of 20% Tetraconazole emulsion.

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