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Genetic control method for tea geometrids

A genetic control and tea geometrid technology, which can be applied to botany equipment and methods, horticulture, plant protection, etc., can solve the problem of unsatisfactory control effect

Active Publication Date: 2014-02-19
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

[0031] Example 2 Control of tea geometrid (population B) in Quzhou area (release the males of population A to population B)

[0032] (1) Prediction of tea geometrid control plots

[0033] 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 number of adults...

Embodiment 3

[0047] 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)

[0048] (1) Prediction of tea geometrid A population in the control area

[0049] 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.

[0050] 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).

[0051] (2) Collection and rearing of tea geo...

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Abstract

The invention provides a genetic control method for tea geometrids, and belongs to the technical field of tea geometrid control methods. The genetic control method for the tea geometrids comprises the following steps of (1) controlling A population of tea geometrids in the northern area of the Zhejiang province, the southern area of the Jiangsu province and the eastern area of the Anhui province and B population of tea geometrids in the other areas of the China; (2) forecasting the occurrence quantity and the emergence period of the tea geometrids in the controlled areas; (3) collecting and feeding the population of the controlled tea geometrids; (4) releasing of pupas or imagoes: releasing male pupas or male moths in the B population into the A population according to the proportion of the sum of the A population: the sum of the B population=1:0.5-1.5 when the B population is used for controlling the A population; and releasing male pupas or male moths in the A population into the B population according to the proportion of the sum of the B population: the sum of the A population=1:0.5-1 when the A population is used for controlling the B population. Injurious insects are regulated and controlled by mutual interference of different geographical populations; the genetic control method is a green control method; and the problem of pesticide residue can be solved, so that the safety on tea leaves can be improved.

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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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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