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 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. If only lower stages were available, i.
Therefore, appropriate strategies should be adopted to control the epicenter populations, which occurs in a smaller area. 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.
Hyblaea puera Cramer Lepidoptera: Molecular markers, natural history and evolution. Analysis The polymorphic content for nuclear and mitochondrial primers were analyzed using Bionumerics software [ 38 ]. The molecular weight of each band was estimated by comparing with a co-migrating bp ladder Amersham. University of York, UK; The Teak defoliator Hyblaea puera is a pest moth of teak woodlands in India and other tropical regions e.
The Teak defoliator is of major concern since it is involved in complete defoliation of trees during the early part of the growing season. However, a study using the time lapse developmental time between two epidemics to determine whether an earlier epidemic was responsible for causing the subsequent outbreak showed that all subsequent outbreaks could not be attributed to previous outbreaks, thereby indicating the possibility of migrant populations being involved [ 19 ].
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Since the damage is hynlaea severe and effective control measures are unavailable, the large scale planting of teak has been abandoned in PNG.
Received Jul 1; Accepted Feb 2. RAGEP markers were first tested for polymorphisms, species-specificity and repeatability. From Wikipedia, the free encyclopedia. Retrieved 8 August The main parasitoids attacking teak defoliator include the tachinid Palexorisa solennisa eulophid Sympiesis hyblaeaethe chalicid Brachymeria lasus and the three ichneumonidsEriborus gardneriStictopisthus sp.
Retrieved 4 July Evidence from the study of the population dynamics of H.
Hyblaea puera – Wikipedia
This page was last edited on 4 Aprilat This method was found to be efficient, simple and highly reproducible. Use of genetic diversity in movement studies of flying insects. A recent study revealed the existence of density-dependent colour polyphenism and resistance build-up against invading baculovirus by H.
From this dendrogram, it may be deduced that all the seven epidemic population samples tested in the study shared the same gene pool with sets of epicenter populations. University of Technology, Sydney. 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 and persistence [ 10 ].
M depicts variability in Lepidopteran species. They are usually caught for consumption at the cocoon stage, at which point they are easily collected from pyera ground.
Earlier studies had indicated that outbreak begin as small epicenters in February during the pre-monsoon season and end by June. NUMTs in sequenced eukaryotic genomes. Forty-eight species of birds have luera recorded as feeding on teak defoliator larvae during the large-scale outbreaks.
On the other hand, the findings do suggest the alternate hypothesis, i. Eur J of Entomology. A synnematous fungus of the genus Hirsutella is found to be pathogenic to this pest. 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. Hyblaea puera Scientific classification Kingdom: Genetic differentiation between and within strains of the saw-toothed grain beetle, Oryzaephilus surinamensis Coleoptera: 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 in New Zealand, was traced to the eastern coast of South America [ 30 ].
Under the optimal conditions, the larval period lasts 10—12 days. Background Teak Tectona grandis L. Assessing genetic structure with multiple classes of molecular markers: