Ultrastructure of the larval corpus allatum of Hyphantria cunea drury (Insecta, Lepidoptera)

The spatial analysis of distribution and quantity of Hyphantria cunea Drury, 1973 across Ukraine since 1952 till 2016 regarding the values of annual absolute temperatures of ground air is performed using the Gis-technologies. The long-term pest dissemination data (Annual reports…, 1951–1985; Surveys of the distribution of quarantine pests ..., 1986–2017) and meteorological information (Meteorological Yearbooks of air temperature the surface layer of the atmosphere in Ukraine for the period 1951-2016; Branch State of the Hydrometeorological Service at the Central Geophysical Observatory of the Ministry for Emergencies) were used in the present research. The values of boundary negative temperatures of winter diapause of Hyphantria cunea, that unable the development of species’ subsequent generation, are received. Data analyses suggests almost complete elimination of winter diapausing individuals of White American Butterfly (especially pupae) under the air temperature of −32°С. Because of arising questions on the time of action of absolute minimal air temperatures, it is necessary to ascertain the boundary negative temperatures of winter diapause for White American Butterfly. It is also necessary to perform the more detailed research of a corresponding biological material with application to the freezing technics, giving temperature up to −50°С, with the subsequent analysis of the received results by the punched-analysis.

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Corpus Allatum and Corpus Cardiacum in Chironomus sp.

The American Naturalist ◽

10.1086/281221 ◽

1944 ◽

Vol 78 (778) ◽

pp. 472-477 ◽

Cited By ~ 4

Author(s):

H. C. Zee ◽

S. Pai

Keyword(s):

Corpus Allatum ◽

Corpus Cardiacum

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Plasticity of nutrient accumulation patterns in diapausing fall webworm pupae

Bulletin of Entomological Research ◽

10.1017/s0007485321000201 ◽

2021 ◽

pp. 1-8

Author(s):

Lvquan Zhao ◽

Wei Wang ◽

Ying Qiu ◽

Alex S. Torson

Keyword(s):

The Body ◽

Diapause Induction ◽

Energy Reserve ◽

Short Photoperiod ◽

Induction Phase ◽

Energy Reserves ◽

Hyphantria Cunea ◽

Survival And Reproduction ◽

Fall Webworm ◽

Diapause Incidence

Abstract The accumulation of nutrients during diapause preparation is crucial because any lack of nutrition will reduce the likelihood of insects completing diapause, thereby decreasing their chances of survival and reproduction. The fall webworm, Hyphantria cunea, diapause as overwintering pupae and their diapause incidence and diapause intensity are regulated by the photoperiod. In this study, we test the hypothesis that photoperiod influences energy reserve accumulation during diapause preparation in fall webworm. We found that the body size and mass, lipid and carbohydrate content of pupae with a short photoperiod during the diapause induction phase were significantly greater than those of pupae with a relatively short photoperiod, and the efficiency of converting digested food and ingested food into body matter was greater in the short-photoperiod diapause-destined larvae than the relatively short-photoperiod diapause-destined larvae. We also observed higher lipase and amylase activities in short-photoperiod diapause-destined larvae relative to the counterparts. However, no obvious difference was found in protein and protease in the pupae with a short photoperiod during the diapause induction phase and short-photoperiod diapause-destined larvae compared with the counterparts. Therefore, we conclude that the energy reserve patterns of diapausing fall webworm pupae are plastic and that short-photoperiod diapause-destined larvae increase their energy reserves by improving their feeding efficiency and increase their lipid and carbohydrate stores by increasing the lipase and amylase activities in the midgut.

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