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Physiological and ecological Studies on the Species of Capnodis in Palestine (Col., Buprestidae)

I. Studies on the Eggs

Published online by Cambridge University Press:  10 July 2009

E. Rivnay
E. Rivnay
Affiliation:
Agricultural Research Station, Rehovoth.
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Extract

The economic importance of Capnodis in Palestine is discussed; the various species and their hosts are enumerated.

The egg is described and its shell chemically analysed. It was found that potassium, calcium and magnesium are present as cations and chloride and carbonate as anions.

The effects of relative humidity upon the egg are discussed. It is pointed out that the egg is resistant to a low percentage, but succumbs to a high percentage of relative humidity. The rôle of the egg shell in this matter is important.

The effects of the temperature upon the eggs are discussed. Their development at various temperatures is calculated, and the Blunck formula applied. The mortality of the egg at high and low temperatures is shown in tables.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 35 , Issue 3 , November 1945 , pp. 235 - 242
Copyright
Copyright © Cambridge University Press 1945

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