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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Studies on the seasonal incidence of defoliators and the effect of defoliation on volume increment of teak.
In contrast, the endemic populations are genetically distant from the epicenter populations. Evidence from the study of the population dynamics of H.
Large-scale deaths of teak defoliator larvae characterized by cessation of feeding, flaccidity and subsequent liquefaction of body tissues has been reported by Stebbing as early as One of these clusters comprised the majority of the endemic samples with a few samples from epicenter insects, whilst the other cluster was comparatively larger and had the two major sub clusters.
The bands scored for each nuclear RAGEP used in the present study were of a size range bp to bp.
The species has also been recently reported to be present in Central America and Africa. Endemic samples were collected throughout that year based on their stray occurrences in various life stages, whilst epicenter samples from each aggregated patch were collected only from the insects that attained the same stage of its life cycle at the time of collection in that patch.
Under the optimal conditions, the larval period lasts 10—12 days. In each marker, the average number of bands scored varied from 7— The Teak defoliator is of major concern since it is involved in complete defoliation of trees during the early part of the growing season.
All bands scored were of size range bp to kb.
Moth Photographers Group – Hyblaea puera –
Among mitochondrial markers, an average of 1—2 monomorphic bands were observed. Daly JC, Gregg P. Gene flow in ground beetles Coleoptera: Such approaches have also been used to study founder events [ 5 ], geographical invasions [ 6 ], small and large scale displacements [ 78 ], including movement of entire population demes [ 9 ], and even altitudinal movements related to habitat patchiness phera persistence [ 10 ].
Abstract Background The Teak defoliator Hyblaea puera is a pest moth of teak puerw in India and other tropical regions e. International Forestry and Environment Symposium. Hyblaea puera Cramer Pupation may some times occur within green leaves of other plants in the under growth, folded or hyblaeea with silk. Bar coding animal life: The UPGMA dendrogram prevails on the assumption that nucleotide substitution rates are same across all branches. Even in the fully mature larvae, HpNPV can kill in 60—72 hours, making it one of the fastest acting insect viruses.
Hyblaea puera – Wikipedia
Hyblaa information Article notes Copyright and License information Disclaimer. Only bands showing clear and reproducible patterns were included in the final analysis and these were scored. The teak defoliator is present year round in teak plantations, but in varying population densities. They are usually caught for consumption at the cocoon stage, at which point they are easily collected from the ground.
Teak Tectona grandis L. Defoliation does not kill teak trees, but it results in huge amount of puea loss. Every year high-intensity outbreaks of teak defoliator occur immediately after the premonsoon showers in late February or early march in Kerala.
A recent study revealed the existence of density-dependent colour polyphenism and resistance build-up against invading baculovirus by H. Subsequently a data matrix of similarity values was produced for ouera individual for each marker.
Species specificity was evaluated by comparing the banding patterns in H. Genetic differentiation between and within strains of the saw-toothed grain beetle, Pura surinamensis Coleoptera: Background Teak Tectona grandis L.
Early events in the outbreak of teak caterpillar Hyblaea puera. During late July or September, the population declines to the endemic level. Hugh D Loxdale for his valuable suggestions on the manuscript of this paper.
This suggests that under a single demographic structure, two phenotypic classes of H. 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 yhblaea.
Starting with the third instar, the larva hhblaea out a leaf flap, usually at the edge of the leaf, folds it over, fastens it with silk, and feeds from within.
Gene flow, phylogeography and their uses. The caterpillar feeds on teak and other species of trees common in the region,  considered as one of the major teak pests around the world.
Each reaction consisted of 1x Taq piera with 1. Landscape of Nilambur teak plantation showing distribution of the endemic, epicenter and epidemic populations of Hyblaea puera. With respect to the hypotheses put forward regarding the origin of outbreaks of the moth, this hublaea confirms the role of migration in outbreak causation, while negating the belief that endemic populations aggregate to cause an epidemic.
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The degree of variability observed for RAGEPs also argues that this technique could be useful for a variety of questions, including individual identification, strain identification and phylogenetic analysis. Byblaea 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.
These centres are highly localized outbreaks which represents the transitional stage between very sparse endemic population and high density outbreak population.
A synnematous fungus of the genus Hirsutella is found to be pathogenic to this pest.