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Phytoparasitica

, 4:93 | Cite as

Fruit drop and damage in dates: the role ofcoccotrypes dactyliperda F. and nitidulid beetles, and prevention by mechanical measures

  • M. Kehat
  • D. Blumberg
  • S. Greenberg
Research Paper

Abstract

The extent of fruit drop and damage inflicted to date fruit byCoccotrypes and nitidulids was estimated and control measures were investigated. Fruit drop, which occurred mainly in July and resulted in a 30-40% yield loss, was due mainly toCoccotrypes, which attacked unripe fruit. Fruit which dropped and started to rot was infested by nitidulid beetles throughout the summer. Green fruit was not damaged by nitidulids while on the bunches, but only as ripening progressed. Protecting the bunches with dense netting coverings prevented penetration of both pests and greatly reduced fruit drop and infestation. Although the organophosphorus insecticides pirimiphos-methyl and azinphos-methyl were efficient in controlling nitidulids, the mechanical control method was preferable.

Key Words

Dates, drop dates, infestation by insects Coccotrypes dactyliperda Carpophilus hemipterus Carpophilus mutilatus Urophorus humeralis Haptoncus luteolus 

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Copyright information

© Springer Science + Business Media B.V. 1976

Authors and Affiliations

  • M. Kehat
  • D. Blumberg
  • S. Greenberg
    • 1
  1. 1.Div. of Entomology, AROThe Volcani CenterBet Dagan

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