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, Marucavitrata in the Department of Agricultural Entomology, College of Horticulture, KeralaAgricultural University, Thrissur. The calyxes of the flowers were examined and the accessionswere categorized into two groups, partially free (major portion of the sepals free, the basalportion tight) and semi tight (major portion of the sepals tight, only the tip free). Significantvariation was observed in terms of damage to cowpea flowers due to spotted pod borer. Thehighest 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 indicatedthat EC 100092, Palakkadanthandanpayar, TVX – 944, EC 300039, IC 20645 and IC 52110 hadsemi tight calyx characterized by tight sepals with tips alone being free. All these accessionshad 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 ofsepals free with their basal portion tight. Hence, they were grouped as partially free. Freesepals would provide the first instar borer larvae some extent of concealment as well as enableit to bore into the flower more easily. Tight calyx, thus, could possibly have a deterrent effecton the first instar larvae entry.

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An integrated pest management (IPM) strategy to manage bean pod borer (Maruca vitrata) on yard-long bean in southeast Asia

10.1603/ice.2016.107445 ◽

2016 ◽

Author(s):

Sopana Yule

Keyword(s):

Southeast Asia ◽

Integrated Pest Management ◽

Pest Management ◽

Maruca Vitrata ◽

Pod Borer ◽

Ipm Strategy

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Temporal and age-related variations in calling and mating patterns of the Indian population of spotted pod borer, Maruca vitrata Fabricius (Lepidoptera: Crambidae)

International Journal of Tropical Insect Science ◽

10.1007/s42690-020-00403-5 ◽

2021 ◽

Author(s):

G. Basana Gowda ◽

K. R. M. Bhanu ◽

A. K. Chakravarthy ◽

A. D. N. T. Kumara

Keyword(s):

Indian Population ◽

Maruca Vitrata ◽

Mating Patterns ◽

Age Related ◽

Pod Borer

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Infectivity of entomopathogenic nematodes against the legume pod-borer, Maruca vitrata Fabricius, infesting pigeon pea

Journal of Helminthology ◽

10.1017/s0022149x21000043 ◽

2021 ◽

Vol 95 ◽

Author(s):

R. Pervez ◽

U. Rao

Keyword(s):

Entomopathogenic Nematodes ◽

Agricultural Research ◽

Insect Pest ◽

Indian Agricultural Research Institute ◽

Pigeon Pea ◽

Fourth Instar ◽

Maruca Vitrata ◽

Pod Borer ◽

Legume Pod Borer ◽

Maximum Penetration

Abstract The legume pod-borer, Maruca vitrata Fabricius (Lepidoptera: Crambidae) (LPB), is an important insect pest of pigeon pea. Chemical pesticides are generally employed to manage this pest, but because of the soil residue issues and other environmental hazards associated with their use, biopesticides are also in demand. Another benign alternative is to use entomopathogenic nematodes (EPNs) to manage this vital pest. In the present study, the infectivity of ten native EPNs was evaluated against LPB by assessing their penetration and production in the LPB. The effectiveness of the promising EPNs against second-, third- and fourth-instar LPB larvae was also studied. Heterorhabditis sp. (Indian Agricultural Research Institute-Entomopathogenic Nematodes Rashid Pervez (IARI-EPN RP) 06) and Oscheius sp. (IARI-EPN RP 08) were found to be most pathogenic to LPB, resulting in about 100% mortality within 72 h, followed by Steinernema sp. (IARI-EPN RP 03 and 09). Oscheius sp. (IARI-EPN RP 04) was found to be the least pathogenic to LPB larva with 67% mortality. Maximum penetration was exhibited by Heterorhabditis sp. (IARI-EPN RP 06) followed by Oscheius sp. (IARI-EPN RP 08), whereas the lowest rate of penetration was exhibited by Oscheius sp. (IARI-EPN RP 01). The highest rate of production was observed with Oscheius sp. (IARI-EPN RP 08), followed by Oscheius sp. (IARI-EPN RP 04 and 10). Among the tested instars of the LPB larvae, second-instar larvae were more susceptible to EPNs, followed by third- and fourth-instar larvae. The results indicate that Heterorhabditis sp. (IARI-EPN RP 06) and Oscheius sp. (IARI-EPN RP 08) have a good potential to the manage LPB.

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