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Indian Journal of Entomology
Year : 2020, Volume : 82, Issue : 3
First page : ( 528) Last page : ( 531)
Print ISSN : 0367-8288. Online ISSN : 0974-8172.
Article DOI : 10.5958/0974-8172.2020.00132.7

Chlorophyll and brix in sweet sorghum genotypes and their correlation with stem borer Chilo partellus damage

Kumbhar S S, Sonalkar V U*

Sorghum Research Station, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, 444104, Maharashtra

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

Online published on 24 September, 2020.

Abstract

A field experiment was carried out at Akola during kharif 2018 in randomized block design to ascertain eight sorghum genotypes for their brix and chlorophyll variation and their reaction to stem borer Chilo partellus (Swinhoe). The results revealed that the leaf injury rating, deadhearts and stem tunneling were: 1.33–2.33, 1.93–7.14% and 0.00–14.51%, respectively. Minimum leaf injury rating was scored in IS-2205 and with SPV 2600 and SPV 2604; significantly least deadhearts were in resistant check IS 2205 which was statistically at par with four other genotypes; and maximum deadhearts was observed with Swarna, while CSV 24 SS showed no tunneling and least tunneling was in resistant check IS 2205, and maximum tunneling was in Swarna. The least chlorophyll index was in IS 2205, with brix index varying significantly in the evaluated genotypes with the least (2.80) being with IS 2205. The chlorophyll index and brix index had significant positive effect on the deadhearts and stem tunneling. The sweet sorghum genotypes SPV 2604 and SPV 2605 tolerate the feeding by stem borer larvae and limit the tunneling.

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Keywords

Sorghum, Genotypes, Chilo partellus, Leaf injury, Deadhearts, Tunneling, Brix index, Chlorophyll, IS 2205, Swarna, Correlation coefficients.

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