Population dynamics of teak defoliator, Hyblaea puera Cram. (Lep., Hyblaeidae) in teak plantations of Bangladesh, Journal of Applied Entomology, Volume Abstract. Hyblaea puera Cramer (Lepidoptera: Hyblaeidae) was reported in commercial teak (Tectona grandis L. f.) plantations in the states of Campeche and. Hyblaea puera Cramer (Lepidoptera: Hyblaeidae) was reported in commercial teak (Tectona grandis L. f.) plantations in the states of.
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The canopy of teak is continuous within in the observation area. Hybllaea Jul 1; Accepted Feb 2. Mitochondrial DNA sequences are frequently transferred to the nucleus-giving rise to NUMTs, which are considered to be common in eukaryotes [ 22 ].
The present study using RAGEP-PCR provides a tool for a logical continuation of the earlier work to trace the relationship of endemic, epicenter and epidemic populations of the teak defoliator.
Landscape of Nilambur teak plantation showing distribution of the endemic, epicenter and epidemic populations of Hyblaea puera. A recent study revealed the existence of density-dependent colour polyphenism and resistance build-up against invading baculovirus by H. Gene flow in ground beetles Coleoptera: This appears to be a more practical and economical approach for teak defoliator management when compared with management of the pest in the total plantation area covering thousands of hectares.
Carabidae of differing habitat preference and flight-wing development.
Moth Photographers Group – Hyblaea puera –
Defoliation dynamics and evidence for short-range migration of moths. We have used this method hynlaea to evaluate the species specificity, reproducibility and to discriminate among the three different characterised populations of teak defoliator.
Gene flow, phylogeography and their uses. These centres will be 5, to 15, square metres in area and are characterized by heavy tree top infestation. The species has also been recently reported to be present in Central America and Africa. Based on the spatial pattern of infestation in the past, the area was divided into convenient observation units of approximately 50 ha, based on natural boundaries of streams, roads and footpaths.
In contrast, the endemic populations are genetically distant from the epicenter populations. If only lower stages were available, i. Evidence from the study of the population dynamics of H. During periodical outbreaks, as they occurred at Brown River or Gabensis, the host can be severely or completely defoliated. Methods in Molecular Biology. Archived from the original on Geographic structure of insect populations: In this study, we used a variant of the RAPD approach involving various hyblada and mitochondrial gene specific primers to trace the origin of teak defoliator outbreaks.
Conclusions This method also allowed us to comment with some certainty that hybleaa endemic teak defoliator, H. Males and females emerge more or less simultaneously and mating takes place within a couple of days. Retrieved from ” https: The larval samples that were geographically close and had a difference of one complete life cycle stage between the population groups were subjected to molecular studies to evaluate their relatedness.
DNA isolation DNA extraction was performed with a minor modification of isolation and purification protocol as described earlier [ 37 ] being extracted from whole larvae and quantified spectrophotometrically using a spectrophotometer at nm Shimadzu. The teak moth, in Indonesia known as entung jati, is commonly eaten in the regions where they thrive.
Therefore, appropriate strategies should be adopted to control the epicenter populations, which occurs in a smaller area. Several technical advancements on the DNA fingerprinting methodologies have been established to resolve the taxonomic uncertainties and address the issue on species variability and migration [ 13 – 162021 ].
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The average pupal period lasts six to eight days under optimal conditions. Similarly in the second major cluster, the remaining populations from the epicenter and entire epidemic insect populations were likewise seen to fall into two distinct sub-clusters. It is difficult to predict the exact time and place of these outbreaks. Predatory insects including wasps, spiders, birds and bonnet macaqueswhich are known to comprise the predator complex of H.
Microscopic observation of tissues revealed the presence of refractile polyhedral inclusions bodies, which stained blue in Giemsa, and measuring 0. Genetic differentiation between hybalea within strains of the saw-toothed grain beetle, Oryzaephilus surinamensis Coleoptera: Genetic consequences of an invasion through a patchy environment — the cynipid gall wasp Andricus quercuscalicis Hymenoptera: The molecular weight of each band was estimated by comparing with a co-migrating bp ladder Amersham.
During the period of natural defoliation of teak November, December, Januarythe pest density is very low endemic. During late Hybaea or September, the population declines to the endemic level. Teak defoliator outbreaks are a regular annual feature puea most teak plantations in India and it is extremely difficult pera predict the exact time and place of occurrence of these outbreaks.
Noctuidae Bull Entomol Res.
A Hyblea fingerprinting procedure for ultra high-throughput genetic analysis of insects. Randomness of genome amplification methods have been efficiently used in constructing the phylogenetic history in the weevil, Aubeonymus mariafranciscae Roudierwhich had diverged recently [ 5 ], whilst the origin of the Argentine stem weevil, Listronotus bonariensis Kuschel pura New Zealand, was traced to the eastern coast of South America [ 30 ].
This pest is of major concern as it is involved in complete defoliation of trees during the early part of the growing season. In each marker, the average number of bands scored varied from 7— CN and MB performed the molecular studies and are responsible for the interpretation of molecular data whilst TV and VVS performed the field data collection and are responsible for spatial and temporal data interpretation.
Similarly, while evaluating the observation based on mitochondrial RAGEP’s, it is further apparent that endemic populations were not involved in causing the epidemic.
Subsequently similarity matrixes of all experimental pueera were combined to generate a UPGMA Puer pair-group mathematical average tree. We thank the Department of Biotechnology, Government of India for financial support.
Published online Feb 2. Hyblaea puera Scientific classification Kingdom: Larval samples were collected from the infestation sites.
Evidence gathered from the past decade on the population dynamics of H.