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Open AccessJournal ArticleDOI

Life History, Aggregation and Dormancy of the Rubber Plantation Litter Beetle, Luprops tristis, from the Rubber Plantations of Moist South Western Ghats

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TLDR
Life history, aggregation and dormancy of rubber plantation litter beetle Luprops tristis Fabricius, (Tenebrionidae: Coleoptera) is described from rubber plantation belts in the western slopes of Western Ghats from the south Indian state of Kerala.
Abstract
Life history, aggregation and dormancy of rubber plantation litter beetle Luprops tristis Fabricius, (Tenebrionidae: Coleoptera) is described from rubber plantation belts in the western slopes of Western Ghats from the south Indian state of Kerala. The life cycle lasted 12 months, including the 5 larval instars lasting 1 month, the 3 day pupal stage, and the adult stage that can last 11 months. The adult stage includes an inactive dormancy phase of 9 months in shelters and 1 month each of active pre-dormancy (feeding) and post-dormancy (feeding and reproduction) phases that occur in rubber plantation litter. Reproductive activities are confined to the post-dormancy phase. With the onset of summer rains, huge aggregations of adults invade residential buildings and enter into a state of dormancy for 9 months. Beetle aggregations were in the range of 0.5 million to 4.5 million individuals per residential building. Dormancy in L. tristis is best classified as oligopause, which is intermediate between quiescence and diapause. Adults and larvae feed preferentially on wilted rubber tree leaves. Age-specific variation in mortality during dormancy is distinct with higher survivability for adults that have a longer pre-dormancy period. Generations are non-overlapping.

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Journal ArticleDOI

Host Plant and Leaf-Age Preference of Luprops tristis (Coleoptera: Tenebrionidae: Lagriinae: Lupropini): A Home Invading Nuisance Pest in Rubber Plantation Belts

TL;DR: It is proposed that in the absence of tender and mature rubber leaves, cocoa becomes the major host plant of L. tristis in rubber plantations in the Western Ghats.
Journal ArticleDOI

Variation in C:N:S stoichiometry and nutrient storage related to body size in a holometabolous insect (Curculio davidi) (Coleoptera: Curculionidae) larva.

TL;DR: The results showed that weevil larvae with larger body mass had a lower carbon content, reflecting decreases in the sequestration rate of C-rich lipids, and larger larvae had elevated concentrations of nitrogen, sulfur, and protein, indicating that the shift in nutrient storage is the main factor causing the variation in larval stoichiometry with body weight.
Journal ArticleDOI

A genome-wide identification of basic helix-loop-helix motifs in Pediculus humanus corporis (Phthiraptera: Pediculidae).

TL;DR: This study identified 55 bHLH motifs encoded in genome sequence of the human body louse, Pediculus humanus corporis (Phthiraptera: Pediculidae), which provide good references for further studies on regulatory functions of b HLH proteins in the growth and development of human bodyLouse.
Journal ArticleDOI

Elements for the sustainable management of acridoids of importance in agriculture

TL;DR: Acridoidea is a superfamily within the Orthoptera order that comprises a group of short-horned insects commonly called grasshoppers and locust species that are major pests of grasslands and crops in all continents except Antarctica.
Dissertation

Importance of diapause aggregations for the reproduction of ladybird hippodamia undecimnotata (Schneider) : (Coleoptera Coccinellidae)

Eline Susset
TL;DR: This thesis shows that the diapause aggregations are part of the mating system of the arthropods and that sexual selection can be a driver of the evolution of diappause aggregations.
References
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Journal ArticleDOI

Regulation of diapause.

TL;DR: A comparison of insect diapause with other forms of dormancy in plants and animals suggests that upregulation of a subset of heat shock protein genes may be one feature common to different types of dormancies.
Journal ArticleDOI

Dormancy in tropical insects.

TL;DR: The primary objective in this review is to dispell this myth by presenting evidence for the widespread existence of diapause among tropical species, and to identify factors implicated in regulation and some of the special problems of diAPause in the tropics.
Journal ArticleDOI

Physiological classification of dormancies in insects

TL;DR: A new classification of dormancies in insects is proposed on the basis of the evolutionary nature of dormancy, its synchronization with the aetiology of the species for their phenological advantage, the nature of ecological adversity, and the consequent physiological and biochemical adjustments.
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