Population dynamics of teak defoliator, Hyblaea puera Cram. (Lep., Hyblaeidae) in teak plantations of Bangladesh
1998; Wiley; Volume: 122; Issue: 1-5 Linguagem: Inglês
10.1111/j.1439-0418.1998.tb01465.x
ISSN1439-0418
Autores Tópico(s)Lepidoptera: Biology and Taxonomy
ResumoAbstract: In Bangladesh one to two population peaks of teak defoliator, Hyblaea puera Cram. occurred between late April and July, followed in some years by another flatter peak in August and September. The temporal and spatial distribution of infestation suggested a short‐range migration of moth. When general flushing of teak occurs in March–April the population starts building up generation by generation. During early build up phase the infestations are distributed in discrete patches. When a critical density is reached in a patch the newly emerged moths migrate to a newly flushed teak areas. After one to three peaks the population declines due to leaf maturity, natural enemies or density dependant food depletion. Until next flushing season the population remains small, non‐migratory but active. This residual population survives on a small but continuous supply of tender leaves prevalent due to phenological variation of teak, and on alternative sources of food. This cycle of ups and downs is repeated every year.
Referência(s)