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Incidence of Winter and Summer Diapause in Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Andhra Pradesh, India

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Relation http://oar.icrisat.org/6813/
http://maxwellsci.com/jp/abstract.php?jid=AJAS&no=311&abs=03
 
Title Incidence of Winter and Summer Diapause in Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Andhra Pradesh, India
 
Creator Jadhav, D R
Armes, N J
Bhatnagar, V S
 
Subject Entomology
 
Description The incidence of winter and summer diapause was studied by large-scale field samplings of larvae and pupae of the cotton bollworm, Helicoverpa armigera (Hüb) conducted over a period of 13-years during winter and summer seasons in Andhra Pradesh, India. Induction of winter diapause was associated with cooler prevailing temperatures and shorter day lengths of 32°C during March-April resulting in greater adult emergence with the onset of the monsoon season during mid-June to early July. In summer, few alternate hosts are available for larvae to sustain by allowing local populations colonizing newly germinated host crops with the onset of the rainy season. In addition, the incidence of winter and summer diapause was higher in male pupae than females in the ratio of 4:1 and 3:1 (♂:♀), respectively. Diapause populations of H. armigera were most common in the cyclonic weather prevailed for several weeks during 1977-78 (15.11%) and 1995-96 (17.64%). Under these conditions, an average of
 
Publisher MAXWELL Science Publication
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6813/1/AJAS_5_3_40-51_2013.pdf
Jadhav, D R and Armes, N J and Bhatnagar, V S (2013) Incidence of Winter and Summer Diapause in Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Andhra Pradesh, India. Asian Journal of Agricultural Sciences, 5 (3). pp. 40-51. ISSN 2041-3890