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53335

EFFICACY OF CERTAIN ACARICIDES AGAINST Tetranychus urticae AND THEIR SIDE EFFECTS ON NATURAL ENEMIES, Phytoseiulus persimilis AND Stethorus gilvifrons

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Last updated: 22 Jan 2023

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Abstract

              The objective of this study was conducted to determine the efficacy of five acaricides; Abamectin, Emamectin benzoate, Acequinocyl, Chlorfenapyr and Hexythiazox against Tetranychus urticae and its natural enemies, Phytoseiulus persimilis and Stethorus gilvifrons. The tested acaricides were arranged in a descending order of speed of action against T. urticae as follows: Abamectin, Emamectin benzoate, Acequinocyl, Chlorfenapyr and Hexythiazox with LT50; 1.77, 2.85, 3.16, 3.94and 4.55 days, however, the corresponding speed action index were 100.00, 62.11, 56.01, 44.92 and 38.90%, respectively. Concerning P. persimilis, Abamectin was the slowest Speed of action compared with other tested acaricides (LT50= 4.31 days) followed by Acequinocyl, Emamectin benzoate, Chlorfenapyr and Hexythiazox with LT50; 2.90, 1.78, 1.38 and 1.03 days and the corresponding speed action index of 23.90, 35.52, 57.87, 74.64 and 100.00 %, respectively. Also, Abamectin recorded the lowest Speed of action against S. gilvifrons (LT50= 4.16 days) followed by Acequinocyl, Emamectin benzoate, Hexythiazox  and Chlorfenapyr with LT50; 2.81, 2.61, 1.89 and 1.85 days and the corresponding speed action index of 44.47, 65.84, 70.88, 97.88 and 100.00 %, respectively. Reviewing the obtained results, it can be noticed that Abamectin was the quickest in its action against T. urticae and the slowest against P. persimilis and S. gilvifronscompared with other tested acaricides. The efficacy of the tested acaricides on the population density of T. urticae could be arranged according to the general mean of reduction percentage in a descending order as follows: Abamectin, Acequinocyl, Hexythiazox, Emamectin benzoate and Chlorfenapyr which recorded 83.29, 66.06, 56.40, 53.02 and 25.67% reduction, respectively.

DOI

10.21608/jppp.2015.53335

Authors

First Name

Alyaa

Last Name

Tawfik

MiddleName

A.

Affiliation

Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.

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First Name

Laila

Last Name

Elgohary

MiddleName

R. A.

Affiliation

Pesticide Dept., Faculty of Agriculture, Mansoura University, Egypt.

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Volume

6

Article Issue

3

Related Issue

8138

Issue Date

2015-03-01

Receive Date

2019-10-14

Publish Date

2015-03-01

Page Start

513

Page End

525

Print ISSN

2090-3677

Online ISSN

2090-3758

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https://jppp.journals.ekb.eg/article_53335.html

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https://jppp.journals.ekb.eg/service?article_code=53335

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6

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Original Article

Type Code

888

Publication Type

Journal

Publication Title

Journal of Plant Protection and Pathology

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https://jppp.journals.ekb.eg/

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Article

Created At

22 Jan 2023