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3346

Population Dynamic of Phenacoccus solenopsis Tinsley on Cotton Plants and Its Susceptibility to Some Insecticides in Relation to the Exposure Method

Article

Last updated: 01 Jan 2025

OverviewSimilar Items

Subjects

-

Tags

Plant pest management

Abstract

The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) was first recorded during 2014 as an invasive cotton pest in Egypt. Thus, field experiments were conducted during the seasons 2015 and 2016 to study the population dynamic of P. solenopsis on cotton in Kafr El-Sheikh governorate, Egypt. Also, chlorpyrifos, methomyl, deltamethrin, lufenuron, acetamiprid, thiamethoxam and imidacloprid were tested for their toxicity to the third instar nymphs of P. solenopsis under laboratory conditions using leaf-dip and insect-spray methods. In both seasons, the infestation of P. solenopsis started during the early June when the cotton plants aged about two months. The highest population densities of 142.9+15.6 and 191.5+18.1 insects per twig were recorded on September 6th 2015 and September 11th 2016, respectively. The infestation was positively correlated with the maximum (r = 0.77) and minimum (r = 0.71) temperature and the relative humidity (r = 0.49). Based on the multiple regression analysis and the coefficient of determination values (R2), the maximum and minimum temperature and the relative humidity were responsible for the changes in the insect population by 54.2 -- 63.7%. Thiamethoxam was the most effective insecticide (LC50 = 23.6 mg AI L-1) against the third instar nymphs of P. solenopsis using the leaf-dip method, while lufenuron was the least toxic one with LC50 value of 556.1 mg AI L-1. When the insect-spray method was adopted, the toxicity of deltamethrin and lufenuron increased, whereas the toxicity of the others decreased comparing to that obtained in the leaf-dip method.
 

DOI

10.21608/asejaiqjsae.2017.3346

Keywords

Phenacoccus solenopsis, Cotton, population dynamic, weather factors, Insecticides, exposure method

Authors

First Name

El-Zahi

Last Name

Saber El-Zahi

MiddleName

-

Affiliation

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

Email

zasaber951@yahoo.com

City

-

Orcid

-

First Name

Abd-Elsalam

Last Name

Ismail Farag

MiddleName

-

Affiliation

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

Email

-

City

-

Orcid

-

Volume

38

Article Issue

April-June

Related Issue

348

Issue Date

2017-06-01

Receive Date

2017-05-01

Publish Date

2017-06-01

Page Start

231

Page End

237

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 38_Issue April-June_Pages 231-237.pdf

PDF . 799.5kB

Link

https://asejaiqjsae.journals.ekb.eg/article_3346.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=3346

Order

9

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Population Dynamic of Phenacoccus solenopsis Tinsley on Cotton Plants and Its Susceptibility to Some Insecticides in Relation to the Exposure Method

Details

Type

Article

Created At

22 Jan 2023