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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue May 2021, 42 (3)                                     Back


nstantaneous and historical temperature effects on a-pinene

Host suitability and differential performance parameters of cotton mealybug, Phenacoccus solenopsis for resistance in fibre crop, kenaf genotypes

 

S. Satpathy1*, B.S. Gotyal1, N. M. Alam2 and V. Ramesh Babu1

1Division of Crop Protection, ICAR-Central Research Institute for Jute and Allied Fibers, Barrackpore-700 121, India

2AINPNF Section, ICAR-Central Research Institute for Jute and Allied Fibers, Barrackpore-700 121, India

*Corresponding Author Email : satp1@rediffmail.com

 

Received: 30.06.2020                                                                 Revised: 28.10.2020                                              Accepted: 12.12.2020

 

 

Abstract

Aim: To enumerate resistance in Kenaf (fibre crop) genotypes with distinct host suitability, biological performance and growth parameters of mealybug, Phenacoccus solenopsis Tinsley.

Methodology: Laboratory and glasshouse experiments were conducted to assess the host suitability and resistance of genotypes on the basis of relative colonization, growth and survival in terms of establishment rate and nymphal duration of mealybug.

Results: The wild accession, WHIJ 50 belonging to Hibiscus spp. and the variety JRM 3 of H. cannabinus recorded significantly lowest female establishment rate, instantaneous population increase, nymphal survival and growth index with longer nymphal duration possessing possible antixenosis- and antibiosis- mediated resistance. On the other extreme the susceptible genotype, WHIN 47 (H. acetocella) proved favourable for crawler developmental parameters.      

Interpretation: The level, mechanism and basis of resistance in kenaf enumerated from this study may pave the way for creating vigorous kenaf hybrids resistant to cotton mealybug.       

Key words: Antixenosis, Cotton mealybug, Fiber crop, Host suitability, Kenaf, Resistance

 

 

 

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