HYBLAEA PUERA PDF

Hyblaea puera explained Hyblaea puera, the teak defoliator, is a moth native to south-east Asia. It was first described by Pieter Cramer in The species has also been recently reported to be present in Central America and Africa. The caterpillar feeds on teak and other trees. Recent reports place it in Guadeloupe , and Suriname.

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Kajar Earlier studies also indicated that the outbreaks begin as small epicenters during the pre-monsoon season [ 4 ]. Acknowledgements We thank the Department of Biotechnology, Government of India for financial support. The molecular weight of each band was estimated by comparing with a co-migrating bp ladder Amersham. By using this site, you agree to the Terms of Use and Privacy Policy.

A rapid spread of infection in the insect body leads immediately to cessation of feeding and later on, to pueta. Genetic consequences of an invasion through a patchy environment — the cynipid gall wasp Andricus quercuscalicis Hymenoptera: Use of RAPDs to examine, for example, population subdivision of the saw toothed grain beetle, Oryzaephilus surinamensis L. In other projects Wikispecies. The maximum numbers of bands detected was found using primer SR-J, the minimum numbers using marker N4-N 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 — ].

With the Teak defoliator, earlier studies based on temporal and spatial distribution of the larvae indicated that the epicenters were not constant over the years and did not represent highly favourable local environments [ 3 ]. Hyblaea puera — Wikipedia It has been estimated that in the Nilambur teak plantation during the study period, protected trees increased by an annual increment of 6.

The entire leaf, excluding the major veins of tender leaves, is eaten, but more veins are left in older hyblaez. 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. Under the optimal conditions, the larval period lasts 10—12 days.

Monophyly and a strong biogeographic pattern of each biotype have been reported in whitefly, Bemisia tabaci Gennadius populations studied throughout the world [ 27 ].

The teak defoliator, Hyblaea puera: The discovery of virus disease on H. Forty-eight species of birds have been recorded as feeding on teak defoliator larvae during the large-scale outbreaks. Primers were initially screened for polymorphism and repeatability. Clarendon Press, Oxford; From Wikipedia, the free encyclopedia. Males and females emerge more or less simultaneously and mating takes place within a couple of days. Amplifications were performed in similar cycling conditions in a Thermocycler Biorad programmed as follows: The ECVs which are the progenies released into the haemocoel from the midgut cells are more infectious than the Hyblada and mediate disease spread within the insect body.

In each marker, the average number of bands scored varied from 7— The canopy of teak is continuous within in the observation area.

While studying the differentiation process of grain aphid, Sitobion avenae F. Typically the larvae turn over puerq leaf puega and attach puerra to the rest of the leaf with a silken thread. Normalization helped us to control the brightness and streakiness of bands without altering the lighter bands and also control the inter-gel mobility shifts. There was a problem providing the content you requested The bacteria Enterobacter aerogenesPuer thuringiensisPseudomonas aeruginosa and Serratia marcescens are identified as causing mortality to the teak defoliator.

Very high rate of horizontal transfer between organellar and nuclear genomes has been reported in the brown mountain grasshopper, Podisma pedestris L. 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. Support Center Support Center. Intl J Ecol Environ Sci.

Hyblaea puera is a common defoliator of teak Tectona grandis that can be found between the West Indies and Fiji. This page was last edited on 4 Aprilat Methods Sample collection 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. There is no evidence of hibernation or aestivation of pupa. Defoliation does not kill the trees, but does lead to huge timber loss.

Evidence gathered from the past decade on the population dynamics of H. Gene flow in ground beetles Coleoptera: All bands scored were of size range bp to kb. Landscape of Nilambur teak plantation showing distribution of the endemic, epicenter and epidemic populations of Hyblaea puera. 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.

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 ].

It is difficult to predict the exact time and place of these outbreaks. Duringan investigation of microbial pathogens of H. It was then suspected that population build-up in the early outbreak epicenters might account for the subsequent widespread epidemic. Teak defoliator outbreaks are a regular annual feature in most teak plantations in India and it is extremely difficult to predict the exact time and place of occurrence of these outbreaks.

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TEAK DEFOLIATOR

In Kanjirappally , Kerala. The teak defoliator is present year round in teak plantations, but in varying population densities. During the period of natural defoliation of teak November, December, and January , the pest density is very low endemic. Every year high-intensity outbreaks of teak defoliator occur immediately after the premonsoon showers in late February or early march in Kerala. These centres are highly localized outbreaks which represent the transitional stage between very sparse endemic population and high density outbreak population. These centres will be 5, to 15, square metres in area and are characterized by heavy tree top infestation.

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Hyblaea puera explained

Potential estimation of [the] predatory bug, Canthecona furcellata Wolff Hemiptera: Pentatomidae against [the] poplar defoliator, Clostera cupreata Lepidoptera: Notodontidae. The problem of insect defoliation of teak - To spray or not to spray. In: Mathur NK, ed. Proceedings of 2nd Forestry Conference, Volume 2. Migration, a mechanism of parasite evasion. Proceedings of the National Conference on Entomophagous insects,

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