Helicoverpa armigera (Hubner) (Noctuidae: Lepidoptera) is a major
threat to intensive agriculture (Sigsgaard et al 2002). Its wide
dissemination and pest status has been attributed to its polyphagy,
and its ability to undergo both facultative diapause and seasonal
migration (Fitt, 1989). Worldwide the annual control costs and
production losses due to H. armigera amount to US $ 5 billion
(Anonymous 2005b) while in India damage worth US $ 1 billion has
been estimated (Subramanian and Mohankumar, 2006). This species is
a key pest of Berseem seed crop in Punjab since 1940s. (Dhaliwal
and Sidhu 1990). Severe infestation by H. armigera reduced seed
yield by 70-80 per cent in the Amritsar district during 1969 (Singh
et al 1973). Information on the population build up and development
of H. armigera on these fodder legumes is scanty in literature and,
thus, the present studies on H. armigera have been planned to study
the population build up, comparative development and survival and
food consumption of H. armigera on selected genotypes of Berseem,
Lucerne and Shaftal.
General
| Imprint: |
Lap Lambert Academic Publishing
|
| Country of origin: |
Germany |
| Release date: |
April 2012 |
| First published: |
April 2012 |
| Authors: |
Jaspreet Kaur Sidhu
• Ramesh Arora
|
| Dimensions: |
229 x 152 x 6mm (L x W x T) |
| Format: |
Paperback - Trade
|
| Pages: |
96 |
| ISBN-13: |
978-3-8484-4578-3 |
| Categories: |
Books
|
| LSN: |
3-8484-4578-6 |
| Barcode: |
9783848445783 |
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