Abstract
The sweep net was used for studying the relationship between predators (Hippodamia convergens Guer. and Chrysopa carnea Stephens) and preys (Aphis faba Scopoli, Aphis gossypii Glover and Myzus persicae Sulzer). Regular samples were collected weekly from Alfalfa at the two stations (A & B) in the two trapping years (March 2007February 2009). The seasonal distributions showed that Hippodamia convergens Guer. ,Chrysopa carnea Steph., Aphis faba Scopoli, Aphis gossypii Glover and Myzus persicae Sulzer had three generations per year. The relationship between the activity of predators (H. convergens, C. carnea) and preys (A. faba, A. gossypii, M. persicae) explained that the more increasing in the predators the more decreasing in the population of the preys.
Highlights
Convergens, C. carnea) and preys (A. faba, A. gossypii, M. persicae) explained that the more increasing in the predators the more decreasing in the population of the preys
Predation is a kind of intimacy where attacking one a predator to prey for food, and eliminate the predator with the prey a period of time and may exercise the predatory habits in the larval or nymph stages or in the adult insect, but some insects are predators in the adult insect or incomplete phase, such as (Family: Coccinellidae) or predators in the developed larvae only, such as some types of Aphid lion (Family: Chrysopidae)
The sweep net was used for studying the relationship between catches of predators (Hippodamia convergens Guer. and Chrysopa carnea Stephens) and preys (Aphis faba Scopoli, Aphis gossypii Glover and Myzus persicae Sulzer) at the two stations (A& B) in the two trapping years (March 2007- February 2009)
Summary
Few attempts have been made to study the relationship between catches of family Coccinellidae and aphid by Foott (1973), Mack and Smilowitz (1982), Hemptinne and Dixon (1997), Solomon et al,(2000), Papachristos and Milonas (2008) and Piñol et al, (2009). (1999) made studies on the relationship between catches of family Chrysopidae and aphid. The aim of the present work initiates to throw abeam light on the seasonal distribution of some species of Coleoptera, Hemiptera and Neuroptera. This work is aimed to clarify the association between the predatory behaviors of Coccinellidae, Chrysopidae and aphid species
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