Diapause Conditions Research Articles

Growth and Feeding Behavior of Larvae of Ctenicera Aeripennis Destructor (Brown) (Coleoptera: Elateridae). I. Effects of Carrot Slices and Seeds of Wheat, Flax, Barley, Rye, and Alfalfa1

Strickland (1933, 1939) studied the effects of various natural foods on the survival of larvae of Ctenicera aeripennis destructor (Brown), and Evans and Gough (1942) investigated some of the factors that influence growth of larvae of Agriotes spp. Kosmachevskii (1950) reported a diapause condition when larvae of Agriotes meticulosus Cand. were reared in washed sand in test tubes with germinating wheat seeds for food. This is a report on the growth and the feeding behavior of larvae of C. a. destructor reared on carrot slices and seeds of wheat, flax, barley, rye, and alfalfa provided individually and in combination.

THE DIAPAUSE AND RELATED PHENOMENA IN GILPINIA POLYTOMA (HARTIG): II. FACTORS INFLUENCING THE BREAKING OF DIAPAUSE

Field and laboratory experiments have shown the importance of a period of "cold-rest" at a temperature below the threshold of development as a requirement for overcoming diapause in the spruce sawfly, especially in stock from a one-generation area. After cold-rest, maximal development results at a temperature of 74° to 75° F. or higher, and after contact with water. Temperatures in the field are lower and fail to promote so high development as may be obtained in the laboratory; however, temperature variations between 65° and 45° F. evidently have little influence on the degree of emergence from the diapause condition, though speed of development is directly affected. The benefit of contact with water is reduced or lost if contact occurs only while soil temperature remains below the threshold of development, and if the moisture taken up in the cocoon wall is lost by evaporation before it can be absorbed by the larva. The role of the cocoon in water exchanges, and differential effects of abnormal weather conditions upon intracocoon development in stocks in one-generation and two-generation areas, are described.

Physiological Characteristics of the Diapause Grasshopper Egg. I. The Stability of the Diapause Condition

Previous articleNext article No AccessPhysiological Characteristics of the Diapause Grasshopper Egg. I. The Stability of the Diapause ConditionJoseph Hall Bodine and Wilbur A. RobbieJoseph Hall Bodine Search for more articles by this author and Wilbur A. Robbie Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Volume 13, Number 4Oct., 1940 Article DOIhttps://doi.org/10.1086/physzool.13.4.30151587 Views: 2Total views on this site Citations: 4Citations are reported from Crossref Journal History This article was published in Physiological Zoology (1928-1998), which is continued by Physiological and Biochemical Zoology (1999-present). PDF download Crossref reports the following articles citing this article:Kurako Kidokoro, Yoshikazu Ando Effect of anoxia on diapause termination in eggs of the false melon beetle, Atrachya menetriesi, Journal of Insect Physiology 52, no.11 (Jan 2006): 87–93.https://doi.org/10.1016/j.jinsphys.2005.09.006V. B. Wigglesworth Development in the Egg, (Jan 1972): 1–26.https://doi.org/10.1007/978-94-009-5973-6_1Eleanor H. Slifer The effects of xylol and other solvents on diapause in the grasshopper egg; together with a possible explanation for the action of these agents, Journal of Experimental Zoology 102, no.33 (Aug 1946): 333–356.https://doi.org/10.1002/jez.1401020307 Joseph Hall Bodine , and Wilbur A. Robbie Physiological Characteristics of the Diapause Grasshopper Egg: II. Changes in Density and Weight during Development, Physiological Zoology 16, no.33 (Sep 2015): 279–287.https://doi.org/10.1086/physzool.16.3.30151700