Method for controlling contagion of citrus huanglongbing by utilizing biological factors and application

A biological factor, citrus huanglong technology, applied in the fields of botanical equipment and methods, application, plant protection, etc., can solve the problems of poor citrus psyllid effect, high number of hair tips, casualties of natural enemies, etc.

Active Publication Date: 2011-08-31
INST OF PLANT PROTECTION FAAS
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The citrus shoots are not uniform in time, the number of shoots is high, and the tender shoots last for a long time. In particular, the fruit-bearing summer shoots are basically not sprayed. Spraying alone is not effective in controlling citrus psyllids, and cannot control the population growth of citrus psyllids, which is one of the important reasons why citrus greening disease continues to spread.
On the other hand, there are more than 850 types of pests and di

Method used

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  • Method for controlling contagion of citrus huanglongbing by utilizing biological factors and application
  • Method for controlling contagion of citrus huanglongbing by utilizing biological factors and application

Examples

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experiment example 1

[0017] The counties and cities of Deqing, Fengkai, Gaoyao, Guangning, and Sihui, which belong to Zhaoqing City, Guangdong Province, are the heavy occurrence areas of citrus Huanglongbing. According to the survey data of Zhaoqing Agricultural Bureau, there are currently 200,000 mu of citrus Huanglongbing occurs in tangerines, accounting for 20% of the total area of ​​citrus in Zhaoqing City, and continues to spread at a rate of 10,000 to 20,000 mu every year. Zhaoqing City Agricultural Bureau cooperated with our institute in a confidential experiment. The experiment proved that the occurrence of citrus Huanglongbing in citrus orchards in Gaoyao City, Deqing County, Fengkai County and other places where the predatory mite-Amblyseius cucurbita was continuously released for several years The rate is lower than that of conventional chemical control gardens, and many healthy trees have lived with adjacent diseased trees for several years without being infected.

experiment example 2

[0019] Comparison of the occurrence and spread of citrus huanglongbing in citrus orchards releasing the predatory mite A. cucurbita A. cucurbita and conventional chemical control orchards without releasing the predatory mite A. cucumberi.

[0020] From 2007 to 2010, we selected a pair of adjacent orchards in Gaoyao City, Zhaoqing City, and conducted experimental follow-up observations:

[0021] The experimental example is in Yan Village, Huodao Town, Gaoyao City. Fruit farmers Liu Yongfei and Liu Kunxiong bought 1,000 Shatangju fruit seedlings on the same day in the same fruit seedling farm in Liantang Town, Gaoyao City in 2004, and planted them in less than 60 adjacent fields at the same time. rice orchard. The climate, ecology, soil and agricultural management levels of the two fruit farms are consistent. In 2006, there were 15 and 17 Huanglongbing plants in the two orchards investigated, and the incidence rates were 1.5% and 1.7%, respectively, and 5 of the heavier plants ...

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Abstract

The invention discloses a method for controlling the contagion of citrus huanglongbing by utilizing predatory mites serving as biological factors. The method is characterized by comprising the following steps of: (1) clearing a garden twice every year, namely after tangerines are harvested and when tangerine spring shoots germinate, clearing the garden twice aiming at plant louse and the prevention and control of panonychus citri and other insect pests, so that the insect population of the overwintering plant louse is reduced to the minimum level by using the conventional chemical pesticide for clearing the garden and pruning insect pest twigs; and (2) releasing the predatory mites from middle-to-late March to September every year, wherein the tangerine garden is cleared comprehensively in 7 to 15 days before the predatory mites are released, the killing of the insect pests and the mites and the prevention and control of diseases are performed once aiming at the condition that the diseases, the insect pests and the mites occur in former years in the target tangerine garden, and the used medicaments are chemical pesticides which are used for killing the insect pests, the mites and bacteria effectively and are used conventionally on the market.

Description

technical field [0001] The invention relates to a method and application for controlling the spread of citrus huanglongbing by using a biological factor-predatory mite. Background technique [0002] Citrus huanglongbing (HLB) is a cancer in citrus production worldwide. In recent years, Huanglongbing has spread at a rate of 10-20% in citrus producing areas such as Fujian, Guangdong, and Guangxi in my country, causing great economic losses. At present, the most effective prevention and control measure around the world is to cut down a large number of diseased trees, and the second is to use chemical agents to control the only disseminator of Huanglongbing-Diaphorina citri (Kuwayama). The number of shoots is high and the young shoots last for a long time, especially the fruit-bearing summer shoots are basically not sprayed. The adults of citrus psyllids lay eggs in the gaps between the buds and leaves of citrus after budding. Therefore, spraying alone is used to control citrus...

Claims

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Application Information

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IPC IPC(8): A01G13/00A01G17/00
Inventor 张艳璇林坚贞季洁陈霞
Owner INST OF PLANT PROTECTION FAAS
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