In the process of planting citrus, we encounter white powder and white powder pests, which are generally called "white moths". In order to subdivide tobacco powder and white powder, these two pests do have certain differences. Judging from the shape of the "white moth" parked on the fruit tree, the swallow powder is a bit transparent with white powder on it. The two wings are folded into the roof shape of the old tile house, the front wing is bifurcated, and the head edge is round and deep. The white powder bottle is light yellow, with white wax powder all over, flat wings, undivided front wings and Fuan reddish brown. The "white moth" that pricks fruit water on citrus is more harmful than any powdery mildew if tobacco powder and white powder are mixed together, so it is generally used for prevention and control.

Clear the weeds in the orchard in time, prune the branches below 1 ft, and improve the light transmittance of fruit trees. After pruning fruit trees, testosterone, methyl biocide, insect repellent, avermectin and other drugs should be used in time. When spraying "white moth", it is best to spray cross drugs on the orchard. White moths are mostly distributed on the back of leaves, with long branches and many leaves. Therefore, it is necessary to spread medicine when controlling the white moth, so as to achieve better results. The fine loam and fertile land with deep soil layer and high organic matter content (10g/kg), strong fertility and good air permeability are suitable for soil conservation. The previous crops should be fruits, wheat and beans, and the old planting area should be rotated for 3-5 years.

6000-8000 kg of organic fertilizer in autumn, combined with spring harrow, urea 10 kg/mu, calcium superphosphate 50 kg/mu, potassium sulfate 10 kg/mu. Fertilization should be based on organic fertilizer, with appropriate amount of chemical fertilizer, and the amount of nitrogen fertilizer should be controlled. After applying base fertilizer, use large and medium-sized equipment to plough, and reach the six-character standard of "even, flat, loose, soil, broken and clean". 5 ~ 7 days before sowing, 60 ~ 70 ml /30 ~ 40 kg of 96% Jinduoer EC (96% isopropylamine) can be used for soil sealing and weeding. The spray is not heavy and does not leak. Sprinkle on hair and edges to avoid strong winds. After spraying, shallow mixing should be carried out in time (mixing depth is 6-7 cm), and soft soil should be mixed evenly. The transplanting time of old Shiga depends on the local climate and seedling age, and should generally be after planting. Northern Xinjiang is from early May to mid-May (the temperature in northern Xinjiang is unstable in May). Choose sunny transplant for three consecutive days. The spacing of stumps is 33 ~ 44 cm, the row spacing is 40 ~ 50 cm, and the number of nurseries is 2800 ~ 3000.

Before transplanting, the seedlings were tempered 10 ~ 15 days, and the water and fertilizer were adjusted during seedling tempering. Seedling height 15 ~ 20cm, stem diameter 0.3 ~ 0.4cm, 4 ~ 5 leaves, seedling age 45 ~ 50 days, no pests and diseases. Under normal circumstances, Nuozhiku will let water penetrate before artificial transplantation (it is best not to let water penetrate within 30 ~ 40 cm and not to occupy soil). When seedlings are planted, the cotyledon direction is perpendicular to the row direction, which is beneficial to root development. When transplanting, it should be compressed to avoid the phenomenon of empty seedlings and poor root length (to make the hair roots fully contact with the soil). Pay attention to the weather changes when transplanting, put the pepper seedlings in a cool place as far as possible when they are taken off the shelf to avoid drying the seedbed, and when transplanting, they should be as deep as the cotyledon node (the general transplanting depth is 7-8 cm).