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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue May 2011, 32 (3)                                     Back


nstantaneous and historical temperature effects on a-pinene

Survey for cotton mealybug, Phenacoccus solenopsis

(Tinsley) and its natural enemies

 

Author Details

 

R.K. Tanwar

(Corresponding author)

National Centre for Integrated Pest Management, IARI Campus, Pusa, New Delhi - 110 012, India

e-mail: tanwaripm@rediffmail.com

P. Jeyakumar

National Centre for Integrated Pest Management, IARI Campus, Pusa, New Delhi - 110 012, India

Amar Singh

National Centre for Integrated Pest Management, IARI Campus, Pusa, New Delhi - 110 012, India

A.A. Jafri

National Centre for Integrated Pest Management, IARI Campus, Pusa, New Delhi - 110 012, India

O.M. Bambawale

National Centre for Integrated Pest Management, IARI Campus, Pusa, New Delhi - 110 012, India

 

 

Publication Data

Paper received:

20 April 2010

 

Revised received:

17 August 2010

 

Accepted:

24 September 2010

 

Abstract

Mealybug was considered to be a minor pest of cotton but it emerged as a major pest in 2006-2007 in North and Central zones. Extensive field surveys conducted in cotton fields during 2007-09 in Haryana, Rajasthan and Punjab in the North zone and Madhya Pradesh, Maharashtra and Gujarat in the Central zone indicated that Phenacoccus? solenopsis? was the only major species of mealybug recorded on cotton in North as well as Central zones except one location in Gujarat where Ferrisia virgata Cockerrel was also recorded. Infestation of mealybug at most of the places in North and Central zones ranged from mild (10-20%) to high (40-60%) during 2007 and 2008 but reduced to traces in 2009. Extensive field survey indicated that Aenasius bambawalei Hayat (Chalcidodea: Encyrtidae), an indigenous parasitoid, played a key role in reducing the insect pest infestation. The parasitoid was first recorded in Delhi in July 2008 and by 2009 it was found in most of the cotton growing districts of North and Central zones. Its natural parasitization on P. solenopsis could reach more than 90% at many locations. This is the most successful example of biological control of mealybug. Along with this parasitoid, another parasitoid, Promuscidea unfasciativentris Girault (Chalcidodea: Aphelinidae), was also recorded at most of the locations in smaller proportions.

 

Key words

Mealybug, Phenacoccus solenopesi, Parasitoid, Aenasius bambawalei, Promuscidea unfasciativentris

 

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