Advertisement

Phytoparasitica

, Volume 10, Issue 2, pp 73–78 | Cite as

Biological studies of the date stone beetle,Coccotr ypes dactyliperda

  • D. Blumberg
  • M. Kehat
Article

Abstract

The date stone beetle,Coccotrypes dactyliperda F. (Coleoptera: Scolytidae), is a primary pest of green unripe dates. The adult beetle chews a characteristically round hole in the fruit, which results in the druit dropping 1 or 2 days later. Egglaying and entire development occur within galleries produced by the female in the date stone; males are unable to penetrate the stones. In laboratory cultures and in field-collected date stones, the beetle adult females were predominant (85-93%). Overwintering probably occurs in the adult stage within date stones of fruits which had dropped and were left on the ground. At 28°C the average egg incubation period was 5.9 days, larval duration 12–15 days, and pupal development 4.0 days. Development from egg to adult for females was significantly longer than for males (24.8vs. 22.1 days). Mated females produced males and females, whereas unmated females gave rise to males only. The mean number of progeny per mated female (30.4) was significantly higher than that recorded for unmated females (6.6), but the latter lived significantly longer (73.3vs. 62.9 days).

Key Words

Coccotrypes dactyliperda biology of damage by date stone beetles date palms 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Avidov, Z. and Harpaz, I. (1969) Plant Pests of Israel. Israel Universities Press, Jerusalem.Google Scholar
  2. 2.
    Carpenter, J.B. and Elmer, H.S. (1978) Pests and diseases of the date palm.Handbk U.S. Dep. Agric. 527.Google Scholar
  3. 3.
    Herfs, V.A. (1959) Uber den SteinnusborkenkaferCoccotrypes dactyliperda F.Anz. Schädlingsk. 32: 1–4.CrossRefGoogle Scholar
  4. 4.
    Kehat, M., Blumberg, D. and Greenberg, S. (1976) Fruit drop and damage in dates: The role ofCoccotrypes dactyliperda F. and nitidulid beetles, and prevention by mechanical measures.Phytoparasitica 4: 93–99.CrossRefGoogle Scholar
  5. 5.
    Kehat, M., Stoller, S., Meisner, J. and Greenberg, S. (1966) Development of population and control ofCarpophilus dimidiatus F., C. hemipterus L. andCoccotrypes dactyliperda F. in dates.Israel J. agric. Res. 16: 173–176.Google Scholar
  6. 6.
    Kehat, M., Swirski, E., Blumberg, D. and Greenberg, S. (1974) Integrated control of date palm pests in Israel.Phytoparasitica 2: 141–149.CrossRefGoogle Scholar
  7. 7.
    Lepesme, P. (1947) Les Insectes des Palmiers. Ed. Paul LeChevalier, Paris.Google Scholar

Copyright information

© Springer Science + Business Media B.V. 1982

Authors and Affiliations

  • D. Blumberg
  • M. Kehat
    • 1
  1. 1.Div. of EntomologyARO, The Volcani CenterBet Dagan

Personalised recommendations