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Relationship Between Helicoverpa armigera Hubner and Maruca vitrata (Geyer) Abundance, Damage and Yield Loss in Short-Duration Pigeonpeas

Published online by Cambridge University Press:  19 September 2011

C. Durairaj*
Affiliation:
Department of Agricultural Entomology, Tamil Nadu Agrl.University Coimbatore, 641003, India
T. G. Shanower
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics, Patancheru-502 324, Andhrapradesh, India USDA – Agricultural Research Service, 1500 North Central Avenue, Sidney, MT 59270, USA
V. R. Bhagwat
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics, Patancheru-502 324, Andhrapradesh, India
M. I. Khan
Affiliation:
Pulse Research Unit, Dr Panjabrao, Deshmukh Krishi Vidyapeety, Akola-444 104, Maharashtra, India
D. A. Dodia
Affiliation:
Main Pulse Research Station, Gujarat Agricultural University, Sardar Krishi Nagar-385 506, Gujarat, India
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Abstract

The relationship between abundance of the lepidopteran borers Helicoverpa armigera Hubner and Maruca vitrata (Geyer) and damage and yield loss in short-duration pigeonpeas was studied in two multilocation trials in 1995–1996 and 1996–1997 rainy seasons at four locations in India: Patancheru (Andhra Pradesh), Akola (Maharashtra), Sardarkrishi Nagar (Gujarat) and Vamban (Tamil Nadu). Larval populations of Helicoverpa armigera (Hubner) and Maruca vitrata (Geyer) were correlated with pod damage and grain yields. Significant correlation of location, years and genotype on insect population, level of damage and grain yield was obtained. The effect of plant type on lepidopteran pod damage was also observed. The relationships between pod damage, yield and larval population of Helicoverpa and Maruca are discussed.

Résumé

La relation entre l'abondance des lépidoptères foreurs Helicoverpa armigera Hubner et Maruca vitrata (Geyer), les dégâts et les pertes de rendement des cultures du pois cajan en cycle court a été étudiée dans deux essais multilocaux pendant les saisons des pluies 1995–1996 et 1996–1997, dans 4 localités de l'Inde: Patancheru (Andhra Pradesh), Akola (Maharashtra), Sardarkrishi Nagar (Gujarat) and Vamban (Tamil Nadu). Les niveaux de populations larvaires d'Helicoverpa armigera (Hubner) et Maruca vitrata (Geyer) sont corrélées avec les dégâts des gousses et les rendements en graines. Une corrélation significative a été obtenue avec la localité, l'année, le génotype des populations d'insectes, le niveau des dégâts et les rendements en graines. L'effet du type de plante sur les dégâts sur gousse a également été observé. La relation entre les dégâts sur gousse, le rendement et les niveaux de population d'Helicoverpa et de Maruca sont discutés.

Type
Research Articles
Copyright
Copyright © ICIPE 2003

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References

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