Now that it has entered the summer season, tea production has also entered a period of high incidence of pests and diseases. The main insect pests on the tea plantation in Qingliu County are tea orange borer, false eyelid green leafhopper and whitefly, etc. Failure to prevent and control in time will affect the quality and yield of tea. The occurrence and prevention techniques of tea orange pods are described as follows:
Occurrence and damage:
Tea orange quail, Acaphylla theae (Watt) is a species of genus. Alias ​​tea rust niches. The characteristics of the damage are as follows: if the pods are sucked into leaves or into leaf juice, the leaves will produce red-brown rust spots or yellow veins, atrophy of the buds, severe dry branches and leaves, showing copper red, like fire.
Morphological characteristics:
The adult body is 0.14mm long, long cone-shaped, orange-red, with a slightly wider front end, a tapered rear end, like a carrot, two pairs of feet, a lot of ring folds on the back of the body, and one set of bristles on the abdomen. Ovoid, white and transparent. If the worms are white to light orange, the two pairs of feet are similar to the pods.
Living habits:
In Qingliu County, there are 20 generations a year. Eggs or cubs, Ruojiao and Chengyu grow over the winter in tea leaves. Generations overlap. Temperatures below 10 °C, all ages can continue to move, but mostly in the middle and late March of the following year the temperature rose to the foliage after the damage. After worming, eggs can be laid for 1-2 days, and 15-20 eggs per female. The eggs are scattered in the lower lobe of the dorsal veins of the leaves and spread by wind, rain, human activities, and seedlings. Temperature 18-26 °C, relative humidity of 70% to 80% of its growth and development, heavy rain often inhibit the occurrence of the pest.
Control technology:
(1) Picking several batches in time,
(2) Pay attention to clear the deciduous tea garden.
(3) High pressure spraying or sprinkler irrigation when the population of insect population is large can effectively reduce the population size. Strengthen fertilizer and water management, drought and drought to increase tree vigor.
(4) Chemical control. The use of 73% acetylene catechin emulsion 1500 times, 20% azoline suspension agent 1500 times, 5% avermectin 3000 times control, several agents pay attention to the use of rotation to avoid drug resistance, every 5-7 days , Continuous control of two to three times, you can also use 24% of the endangered suspension agent 5000 times the prevention and treatment, when using endangered, it is best not to note a growing season more than three times. Attention should be paid to the increase in the dilution factor of the acetylene sulphate during orgasm in order to avoid phytotoxicity.
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