How to deal with citrus pests

The citrus red spider is mainly the citrus claw pupa. The sap of citrus leaves, twigs, and fruits is sucked by the scorpion, rufous, and juvenile larvae. It often causes the leaves to become pale green to grayish-white dots and loses luster. The cause of a large number of fallen leaves and shoots, affecting the growth and yield of the tree. The nymphs, larvae and eggs are all red or light red. The length of the adult pupa is 0.3-0.4 mm. It occurs in Guangdong for 15-24 generations a year. The generation overlaps severely, and the peak is usually from March to June or September to November. Period, chemical control can choose to use 4000% of the 4000% Jinbuzhi EC, 20% EC 2000 times the EC spray. Leaf miners, fruit farmers, also known as "planetary insects", "plotting worms", larvae sneaked into young leaves, shoots under the skin of the young shoots, forming a curved tunnel, the victim leaves curling and falling, the growth of new shoots stagnant, wounds susceptible to ulcers disease. Adult silver white, body length 2 mm, fins near the middle of a dark brown "Y"-shaped twill, larvae are flat feet, yellow-green, head triangle. The worms occur in Guangdong for 15 generations a year, overlapped by generations, and development is suitable for 25-29°C. Chemical control can choose to use 40% omethoate 1000 times, 10% 2,000 times the insecticidal king, 15% faster to kill Ding 2000 times, 2.5% Tiangong 3000 times spray. The common occurrence of the scale insects are pointed and black spots, and there are also some species such as red ringworm, sugar slice, horned wax, and blown cotton. Body females are arrow-shaped and males are long and narrow, with body lengths of 2-4 mm. With nymphs and female adults sucking stems, leaves and fruit juices, heavy leaves dry up and shrink, weakening the tree even dead. Chemical control can use 50% of malathion 600-800 times, 35% of smashed 1000-2000 times or 10-20 times of rosin mixture (loose mixture ratio is caustic soda: rosin: water = 2:3:10). The phenomenon of death and resurrection of the insects mentioned by the farmer after 3-4 days of spraying is actually not dead and resurrection, but the pests multiply too quickly. If the control is not thorough, the population can be restored within 7-9 days. Therefore, it is recommended to use some long-acting drugs or killing egg ointment, such as fenbutatin, tetrazine and so on. It is better to use different agents alternately to delay the resistance of insect pests and improve the control effect.

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