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BIOLOGY OF CHRYSOPA PHYLLOCHROMA WESMAEL (NEUROPTERA: CHRYSOPIDAE). II: INTRASPECIFIC INTERFERENCE AND SEARCHING CAPACITY
Author(s) -
Su Jianwei,
Liu Xianghui,
Xiao Nengwen,
Ge Feng
Publication year - 2004
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2004.tb00238.x
Subject(s) - neuroptera , chrysopidae , biology , instar , intraspecific competition , botany , homoptera , aphis gossypii , nymph , horticulture , predator , larva , aphididae , predation , zoology , pest analysis , ecology
  The present study examined intraspecific interference and searching behavior of Chrysopa phyllochroma Wesmael (Neuroptera: Chrysopidae) for Aphis gossypii Glover (Homoptera: Aphididae) nymphs under laboratory and greenhouse conditions. The results were shown as follow: 1) In four different arenas ( i.e . Petri dish, glass vessel, glass vessel with barriers in it, and cage with potted cotton plant), the predaceous efficiency of C. phyllochroma larvae varied with the predator density, the hunt constant ( Q ) and the intraspecific interference (m) increased with the prey density but decreased with the space heterogeneity; 2) In cage with potted cotton plant, the first‐ and second‐instar green lacewing larvae consumed 13.6 and 29.4 cotton aphiddday respectively. The number of cotton aphids consumed by C. phyllochroma on lower leaves was significantly less than that on upper leaves; and 3) In cage with potted cotton plant, the percentage of the first‐ and second‐instar green lacewing larvae located on upper leaves was significant less than that on lower leaves.

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