Red spider rust lice damage fruit control of citrus red spider embroidered tick lice

Citrus red spider and rust tick are one of the main pests in citrus producing areas, with two peaks in a year, spring and autumn. According to the production observation, when the autumn temperature is about 20 ℃, the red spider will have a big outbreak, if the early prevention and control is not proper, then the red spider will appear the harm peak again from late August to October.

Citrus red spider

In order to control citrus red spider and rust wall lice, we should pay attention to the following points: first, to control red spider and rust wall louse in autumn is the key to ensure the high yield of citrus. Spraying acaricide in August can control the harm of red spider and prevent rust tick from harming fruit surface. From September to October, spraying acaricides twice before the second peak of the red spider can control both insects.

The second is the reference index of drug use. When there are 10 to 12 red spiders on each citrus leaf in autumn, the rust wall louse takes 20 leaves or young fruits on the top, middle and bottom of the crown of each citrus tree and examines them carefully with a magnifying glass. When there are insects on 20% leaves or citrus fruit, spray immediately. Visual observation can also be used: when there is a thin dusty substance on the citrus or leaves (molting of the nymph), it shows that the pest population density is high and should be sprayed for control.

The third is to choose acaricides reasonably. Control of red spiders: Crystal stone sulfur mixture (no self-boiling stone sulfur mixture) 150x liquid, or 20% mite Jing 3000 times liquid, 40% gram mites 2000 times 3000 times liquid, mites dangerous 4000 times liquid, etc. In addition, the soil pesticide urea washing powder mixture, that is, according to 1 kilogram of washing powder plus 400 kilograms of 600 kilograms of water, and then adding 0.5 kilograms of urea, the mixture can be sprayed and sprayed 1-2 days after spraying, the control effect can reach about 90%. It can be used to control rust wall lice: Dasheng Manganese 45 (80% mancozeb wettable powder) 600 times, the efficacy of the drug against rust wall lice lasts as long as 30 days and 60 days, and can also control citrus soot. The new oil emulsion (Lvying) 150 × 250 times, 20% methamphetamine 3000 × 4000 times, 65% Dysen zinc 500 times, or 73% Ketate 1500 times had good efficacy against rust ticks.