Developmental Stages and Caste Composition of a Mature and Incipient Colony of the Drywood Termite, Cryptotermes dudleyi (Isoptera: Kalotermitidae)

  title={Developmental Stages and Caste Composition of a Mature and Incipient Colony of the Drywood Termite, Cryptotermes dudleyi (Isoptera: Kalotermitidae)},
  author={Kok-Boon Neoh and Chow‐Yang Lee},
  booktitle={Journal of economic entomology},
ABSTRACT The caste composition and sex ratio in a mature and an incipient colony of Cryptotermes dudleyi Banks (Isoptera: Kalotermitidae) was studied. Biometric descriptors of both immature and sexual castes were developed. Morphometric analysis revealed that there are four larval instars, a pseudergate, and three nymphal instars in the development of C. dudleyi. To differentiate between the fourth larval instars and the pseudergate, pronotal width and tibial length must be taken into account… 

Drywood Pest Termite Cryptotermes brevis (Blattaria: Isoptera: Kalotermitidae): a Detailed Morphological Study of Pseudergates

Comparison between morphometric and morphological variations among immature individuals of C. brevis colonies concluded that abdomen pigmentation and sclerotized cuticle are good characters to differentiate pseudergates from larvae and the absence of wing buds is a good character to differentiate Pseudergate from nymphs.

First record of intersex in neotenic reproductives of the termite Cryptotermes brevis (Isoptera: Kalotermitidae)

Drywood termites of the family Kalotermitidae present a very flexible developmental pattern, in which pseudergates are totipotent and may become reproductives, which suggests egg‐laying activity.

A non-invasive method for sexing first and second instar larvae of termites using external morphology

The morphological sexing presented here has broad applicability in studies addressing sex differences in development, caste differentiation, and behavior, and will contribute to understanding why both sexes co-exist in a termite society and allocate tasks, and which tasks are completely compensable by the other sex, thereby deepening the understanding of social systems where both sexes engage in tasks.

Caste development and sex ratio of the Ryukyu drywood termite Neotermes sugioi and its potential mechanisms

Neither the SRV nor the ICS theory could explain the male-biased sex ratio of N. sugioi, and the remaining possibilities in this species are discussed.

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Eye development in the termite, Incisitermes minor, appeared to follow a divergent pathway from holometabolous insects and an intermediate pathway between typical hemimetabolous eye development and the heterochronic shift observed in other termite species.

Studies on the development of captive termite colonies

The efforts made to develop colonies of Hypotermes obscuriceps, Macrotermes convulsionarius, Microcerotermes cameroni, Odontotermes brunneus, Pericapritermes sp.

Evaluation of a Localized Treatment Technique Using Three Ready-to-Use Products Against the Drywood Termite Incisitermes snyderi (Kalotermitidae) in Naturally Infested Lumber

Twenty-one boards infested with drywood termites were examined for activity using a Termatrac® motion detector and treated with one of three ready-to-use products, providing evidence for a reduction in mean termite populations per board compared to the control.

Do Termitaria Indicate the Presence of Groundwater? A Case Study of Hydrogeophysical Investigation on a Land Parcel with Termite Activity

Investigation of the direct relationship between termitaria and groundwater and the integration of six geoelectrical parameters revealed the termitarium as falling in the middle of the most suitable zone of groundwater and hence can be used as a biomarker in the search of groundwater.

Insect Pest Complex of Wheat Crop

This chapter provides the pest’s taxonomic rank, distribution across the globe, biology and damage of chewing and sucking insect pest of wheat, and management strategies well suited to pest stage and environment.



Developmental Stages and Castes of Two Sympatric Subterranean Termites Macrotermes gilvus and Macrotermes carbonarius (Blattodea: Termitidae)

The developmental stages and castes of two sympatric subterranean termites, Macro-termes gilvus and Macrotermes carbonarius, were studied and biometric descriptors of each caste were developed for the identification of both species.

Termite colony dynamics as revealed by the sex- and caste-ratios of whole colonies ofIncisitermes schwarzi banks (Isoptera: Kalotermitidae)

There was an excess of males among the workers of colonies that had begun to form nymphs and alates, and among the soldiers of all colonies, and the unusual chromosomal mechanism of sex determination was discussed.

Sex Ratios and Development of the Reproductive System in Castes of Reticulitermes flavipes (Kollar) (Isoptera: Rhinotermitidae)

The ratio of females to males in pseudergates, soldiers, nymphs, and alates of Reticulitermes flavipes (Kollar) was 1.03:1, 1.27:1; only in soldiers was the percentage of females significantly greater than that of males.

Polymorphism in the giant cocoa termite,Neotermes papua (Desneux)

By pinpointing the existence of a large pool of pluripotent individuals, in which the penultimate nymphal stage mingles with pseudergates, the present study reveals a great similarity between Neotermes and Prorhinotermes, and suggests that this developmental schema might be generally applicable to termites devoid of a permanent worker caste.

Caste differences in feeding and trophallaxis in the western drywood termite, Incisitermes minor (Hagen) (Isoptera, Kalotermitidae)

Differences in feeding and trophallaxis among castes of the western drywood termite, Incisitermes minor (Hagen), were determined using rubidium (Rb) as a tracer suggesting that there may be a hierarchy of trophalaxis in dry wood termites.

Endocrine signatures underlying plasticity in postembryonic development of a lower termite, Cryptotermes secundus (Kalotermitidae)

These results are the most comprehensive endocrinological data set available for any lower termite, with the potential to serve as baseline for understanding the extreme developmental flexibility underlying the evolution of social life in termites.

Social organization in the drywood termite, Cryptotermes cavifrons: is there polyethism among instars?

Division of labor among larvae and nymphs was investigated in the drywood termite, Cryptotermes cavifrons, by constructing an ethogram and there was no evidence of any strong age or physical caste polyethism in the working instars.

Incidence, size and structure of grapevine infesting groups of Kalotermes flavicollis (Isoptera: Kalotermitidae) in Sherry vineyards (Spain)

Grapevine trunks in Sherry vineyards (Andalusia, SW Spain), yielding important registered designation of origin wines, are seriously affected by the drywood termite Kalotermes flavicollis. In order

Regulation of sexual development in the basal termite Cryptotermes secundus: mutilation, pheromonal manipulation or honest signal?

  • J. Korb
  • Biology
  • 2004
This study on a basal termite, Cryptotermes secundus (Kalotermitidae), suggests that the importance of aggressive manipulations in termites has been overemphasized, and shows that the potential for intense conflict among termite nestmates is low compared to hymenopteran societies.

Neotenic production inCryptotermes brevis (Walker): Influence of geographical origin, group composition, and maintenance conditions (Isoptera: Kalotermitidae)

SummaryA comparative experiment with groups of mostly brachypterous nymphs ofCryptotermes brevis, originating either in America or Australia, revealed significant differences in neotenic production