Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)

Twenty cowpea accessions were evaluated for resistance to the spotted pod borer, Maruca vitrata in the Department of Agricultural Entomology, College of Horticulture, Kerala Agricultural University, Thrissur. The calyxes of the flowers were examined and the accessions were categorized into two group...

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Autores principales:	A N Nasiya-Beegum, Madhu Subramanian
Formato:	article
Lenguaje:	EN
Publicado:	Society for Promotion of Horticulture - Indian Institute of Horticultural Research 2018
Materias:	calyx, resistant, cowpea, pod, maruca vitrata Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/a691c0c46b094a5a8b4361afb4fc01d6
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spelling	oai:doaj.org-article:a691c0c46b094a5a8b4361afb4fc01d62021-12-02T10:22:30ZEffect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)0973-354X2582-4899https://doaj.org/article/a691c0c46b094a5a8b4361afb4fc01d62018-12-01T00:00:00Zhttps://jhs.iihr.res.in/index.php/jhs/article/view/519https://doaj.org/toc/0973-354Xhttps://doaj.org/toc/2582-4899Twenty cowpea accessions were evaluated for resistance to the spotted pod borer, Maruca vitrata in the Department of Agricultural Entomology, College of Horticulture, Kerala Agricultural University, Thrissur. The calyxes of the flowers were examined and the accessions were categorized into two groups, partially free (major portion of the sepals free, the basal portion tight) and semi tight (major portion of the sepals tight, only the tip free). Significant variation was observed in terms of damage to cowpea flowers due to spotted pod borer. The highest extent of flower damage (50.39 %) was recorded in case of Bhagyalakshmy. Categorization of the different accessions on the basis of the configuration of calyx indicated that EC 100092, Palakkadanthandanpayar, TVX – 944, EC 300039, IC 20645 and IC 52110 had semi tight calyx characterized by tight sepals with tips alone being free. All these accessions had consistently low levels of infestation ranging from zero to 3.16 per cent. The accessions C – 152, Kanakamony, PKM – 1, Anaswara, IC 20431, Sreya, Hridya, Mysore local, IC 52105, Kashikanchan, Vellayani Jyothika, Malika, Bhagyalakshmy and Lola had major portion of sepals free with their basal portion tight. Hence, they were grouped as partially free. Free sepals would provide the first instar borer larvae some extent of concealment as well as enable it to bore into the flower more easily. Tight calyx, thus, could possibly have a deterrent effect on the first instar larvae entry.A N Nasiya-BeegumMadhu SubramanianSociety for Promotion of Horticulture - Indian Institute of Horticultural Researcharticlecalyx,resistant,cowpea,pod,maruca vitrataPlant cultureSB1-1110ENJournal of Horticultural Sciences, Vol 13, Iss 2, Pp 209-212 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	calyx, resistant, cowpea, pod, maruca vitrata Plant culture SB1-1110
spellingShingle	calyx, resistant, cowpea, pod, maruca vitrata Plant culture SB1-1110 A N Nasiya-Beegum Madhu Subramanian Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
description	Twenty cowpea accessions were evaluated for resistance to the spotted pod borer, Maruca vitrata in the Department of Agricultural Entomology, College of Horticulture, Kerala Agricultural University, Thrissur. The calyxes of the flowers were examined and the accessions were categorized into two groups, partially free (major portion of the sepals free, the basal portion tight) and semi tight (major portion of the sepals tight, only the tip free). Significant variation was observed in terms of damage to cowpea flowers due to spotted pod borer. The highest extent of flower damage (50.39 %) was recorded in case of Bhagyalakshmy. Categorization of the different accessions on the basis of the configuration of calyx indicated that EC 100092, Palakkadanthandanpayar, TVX – 944, EC 300039, IC 20645 and IC 52110 had semi tight calyx characterized by tight sepals with tips alone being free. All these accessions had consistently low levels of infestation ranging from zero to 3.16 per cent. The accessions C – 152, Kanakamony, PKM – 1, Anaswara, IC 20431, Sreya, Hridya, Mysore local, IC 52105, Kashikanchan, Vellayani Jyothika, Malika, Bhagyalakshmy and Lola had major portion of sepals free with their basal portion tight. Hence, they were grouped as partially free. Free sepals would provide the first instar borer larvae some extent of concealment as well as enable it to bore into the flower more easily. Tight calyx, thus, could possibly have a deterrent effect on the first instar larvae entry.
format	article
author	A N Nasiya-Beegum Madhu Subramanian
author_facet	A N Nasiya-Beegum Madhu Subramanian
author_sort	A N Nasiya-Beegum
title	Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
title_short	Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
title_full	Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
title_fullStr	Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
title_full_unstemmed	Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)
title_sort	effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, maruca vitrata (fab.) (lepidoptera: crambidae)
publisher	Society for Promotion of Horticulture - Indian Institute of Horticultural Research
publishDate	2018
url	https://doaj.org/article/a691c0c46b094a5a8b4361afb4fc01d6
work_keys_str_mv	AT annasiyabeegum effectofconfigurationofcalyxincowpeaflowersoninfestationbyspottedpodborermarucavitratafablepidopteracrambidae AT madhusubramanian effectofconfigurationofcalyxincowpeaflowersoninfestationbyspottedpodborermarucavitratafablepidopteracrambidae
_version_	1718397364566228992

Effect of configuration of calyx in cowpea flowers on infestation by spotted pod borer, Maruca vitrata (Fab.) (Lepidoptera: Crambidae)

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