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Indian Journal of Entomology
Year : 2020, Volume : 82, Issue : 3
First page : ( 442) Last page : ( 444)
Print ISSN : 0367-8288. Online ISSN : 0974-8172.
Article DOI : 10.5958/0974-8172.2020.00115.7

Resistance in cotton genotypes against mealybug Phenacoccus solenopsis tinsley

Thangavel S*, Ganapathy N1

Department of Agricultural Entomology, B A College of Agriculture, Anand Agricultural University, Anand, 388110

1Directorate of Controller of Examinations, Tamil Nadu Agricultural University, Coimbatore, 641003

*Email: entothanga@gmail.com (corresponding author)

Online published on 24 September, 2020.

Abstract

Screening of 16 cotton genotypes against mealybug Phenacoccus solenopsis Tinsley was carried out in pot culture experiment during 2016–17 at the Insectary, Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore. The experiment was laid out following CICR grade index. The results revealed that none of the genotype was completely free from infestation. Based on the resistance index and incidence, genotypes were grouped as: Resistant- Nil; Tolerant- Co 14, MCU 13, Supriya and DCH 32; Moderately resistant- TCH 1819, Suraj, Anjali, MCU 5 VT, LRA 5166, Suvin, Surabhi and Sumangala; Moderately susceptible -CCH 4474, CCH 2623, SVPR 2 and SVPR 4; and Highly susceptible- Nil.

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Keywords

Cotton genotypes, Phenacoccus solenopsis, Screening, Resistant, Susceptible, Resistance index, Pot culture experiment, Incidence.

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