Population dynamics and host range of Macrotoma palmata F. (Coleoptera: Cerambycidae)

Abstract

In Egypt, Macrotomapalmata F. (Coleoptera: Cerambycidae) is a serious polyphagous pest attacking fruit, wood and ornamental trees. Apricot orchards, however, are liable to severe infestation especially in dense plantations. Hosts and degree of infestation in Matrouh, Alexandria, Fayoum and North Sinai were recorded. The seasonal fluctuation in population was monitored on apricot trees at Alexandria and Giza governorates throughout the 3 successive years (1987)(1988)(1989). M. palmata started to emerge during June and continued until October. At both the experimental sites, M. palmata development was influenced by temperature and relative humidity. Resume-En Egypte, Macrotoma palmata F. (Coleoptere: Cerambycidae) est un ravageur polyphage qui attaque gravement les arbres fruitiers, les boisements et les arbres ornementaux. II a ete toutefois souligne que les abricotiers etaient disposes a une severe infestation surtout en cas, de culture dense. Les notes et le degre d'infestation dans chaque gouvernorat etaient enregistres. La fluctuation saisonniere de la population etait controlee sur les abricotiers du gouvernorat d'Alexandrie et celui de Giza pendant les 3 annees successives : 1987-1989. L'emergence des scarabees a debute au cours du mois de Juin et a continue jusau'au mois d'Octobre. L'infestation a augmente plus de 3 fois au cours de deus ans. L'emergence du scarabee a ete affectee par la temperature et per l'humidite relative a 0,5-1 et 2,5-4,5 mois avant l'emergence a Alexandrie et a Giza respectivement. L'application des insecticides pour la lutte contre le Af. palmata sur l'abricot doit commencer vers fin Juin ou debut Juillet.

THE RELATIVE SUSCEPTIBILITY AND MONITORING OF CITRUS SPECIES /VARIETIES TO CHLOROPHORUS VARIUS Mull. IN CITRUS ORCHARDS IN EGYPT

“…Larvae of C. varius feed inside the stem and main branches of trees and cause their death, and the total life cycle was completed in almost one year (Tadros, 1993). Frequent field observations indicated that the most important boring pests in citrus orchards are the Coleopterous Cerambycids C. varius that attack 21 fruit tree species (Tadros, 1994) and 14 wood and ornamental tree species (Nour, 1963 andHaggag, 1982), Macrotoma palmata also attack citrus trees (Tadros et al, 1993), the Scolytids Hypothenemus eruditus seriously infest sweet lemon, mandarin, lemon and kumquat (Batt et al, 1993), Scolytus amygdale (Tadros, 1994) and the Bostrichid Enneadesmus obtusedentatus (Tadros et al, 1997), as well as the Lepidopterous Cossid Paropta paradoxa was recorded attacking mandarin trees (El-Assal et al, 2008).…”