Genetic control method for tea geometrids

A technology for genetic control and tea inchworm, which is applied in the fields of botanical equipment and methods, horticulture, plant protection, etc., and can solve the problems of unsatisfactory control effect and the like

Active Publication Date: 2015-06-17
TEA RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the geographic populations of tea geometrids in most areas of my country are resistant to viruses, and the control effect is not ideal, so it is difficult to promote and apply in large areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Prevention and control of tea geometrid (population A) in Hangzhou area (release males of population B to population A)

[0016] (1) Prediction of tea geometrid control plots

[0017] 1. Prediction of occurrence: In the plots that need to be controlled, at the 2nd instar larvae blooming stage (middle stage), use the 5-point sampling method, take a 1m-long tea row at each point, check and record the number of larvae on the surface of the tea bushes, according to The area of ​​1m long tea row is 1.5m 2 , 1 mu covers an area of ​​667m 2 , to calculate the population density. Such as 5 points (7.5m 2 ) the total number of larvae is 70, then the number of 2nd instar larvae per mu is 6225 (70 / 7.5×667). In general, the survival rate (field) of 2nd instar larvae to pupa is 50%, and the survival rate to adult is 40%. 6225 heads × 50% = 3113 heads; 6225 heads × 40% = 2490 heads, that is, in this tea garden, the number of pupae occurrences is 3113 heads, and the num...

Embodiment 2

[0030] Example 2 Control of tea geometrid (population B) in Quzhou area (release the males of population A to population B)

[0031] (1) Prediction of tea geometrid control plots

[0032] 1. Occurrence forecast: In the plots that need to be controlled, at the 2nd instar larvae blooming stage (middle stage), use the 5-point sampling method, take a 1m long tea row at each point, check and record the number of larvae on the surface of the tea bushes, according to The area of ​​1m long tea row is 1.5m 2 , 1 mu covers an area of ​​667m 2 , to calculate the population density. Such as 5 points (7.5m 2 ) the total number of larvae is 70, then the number of 2nd instar larvae per mu is 6225 (70 / 7.5×667). In general, the survival rate (field) of 2nd instar larvae to pupa is 50%, and the survival rate to adult is 40%. 6225 heads × 50% = 3113 heads; 6225 heads × 40% = 2490 heads, that is, in this tea garden, the number of pupae occurrences is 3113 heads, and the number of adults is 2...

Embodiment 3

[0045] Example 3 Tea geometrid control in a large area (20 mu) of tea gardens (such as releasing the male insects of population B to control population A)

[0046] (1) Prediction of tea geometrid A population in the control area

[0047] 1. Occurrence prediction: Visually check whether the occurrence of tea geometrid larvae varies greatly, and investigate in 3 to 4 plots respectively. Refer to Example 1 for the investigation and calculation method of each plot.

[0048] 2. Prediction of occurrence period: In spring and autumn, there are 4 instars of tea geometrid larvae. The duration of the 2nd, 3rd, 4th instar and pupae are 4, 3, 5 days and 8.5 days respectively. ) to pupal stage is 10 days (2+3+5); to adult stage is 18.5 days (2+3+5+8.5 days). For example, the field survey (the middle stage of the second instar) is June 15th, then the pupal stage is June 25th, and the adult stage is July 3rd to 4th (also the egg-laying stage).

[0049] (2) Collection and rearing of tea geo...

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Abstract

The invention discloses a genetic control method for tea inchworm, which belongs to the technical field of tea inchworm control methods. It includes the following steps: 1) Control object: tea geometrids in northern Zhejiang, southern Jiangsu, and eastern Anhui are population A, and tea geometrids in other regions of China are population B; 2) prediction of occurrence and occurrence period of tea geometrids in control plots ;3) Collection and rearing of tea geometrid populations for prevention and control; 4) Release of pupae or adults. When population B is used to control population A, the total number of population A: the number of males of population B=1:0.5~1.5 ratio , release the male pupae or male moths of population B into population A; when using population A to control population B, release the male pupae or male moths of population A to population B according to the ratio of population B: population A = 1:0.5~1 population. The invention regulates the pests through the mutual interference of different geographical populations, is a green prevention and control method, and can alleviate the problem of pesticide residues, thereby improving the safety of tea leaves.

Description

technical field [0001] The invention belongs to the technical field of tea geometrid prevention and control methods, and in particular relates to a control method for reducing the occurrence of tea geometrids by using reproductive interference between two geographical populations of tea geometrids with reproductive isolation. Background technique [0002] Tea inchworm is the main pest of tea trees in my country, and it is distributed in all tea-producing provinces across the country. The insect has many generations (6 to 7 generations a year), has a fast reproduction speed, occurs widely, and is seriously harmful. During a large outbreak, the tea tree leaves and even the tender stems are often eaten up, and the tea trees become bare branches, which not only affects the tea production, but also affects the recovery of the tree vigor. At present, the control method of tea geometrid mainly adopts chemical control. Due to repeated spraying of chemical pesticides and irrational...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G13/00A01K67/033
Inventor 肖强唐美君殷坤山张桂华
Owner TEA RES INST CHINESE ACAD OF AGRI SCI
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