Evaluate the Releasing Second Larval Instar of Coccinella undecimpunctata L. and Chrysoperla carnea (Stephens) as Biological Control Agent against Icerya purchasi Maskell (Hemiptera: Monophlebidae)

Document Type : Original Article

Authors

Plant Prot. Res. Inst., Agric. Res. Center, Dokki, Giza, Egypt.

Abstract

Release of the second larval instar Coccinella undecimpunctata L. (Coleoptera: Coccinellidae) and Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) predators as biological control agent against the population of Icerya purchasi Maskell (Hemiptera: Monophlebidae) under field conditions on Ficus trees at Orman garden at Giza governorate. The obtained result showed that, the average of reduction percentage of nymphs of I. purchasi were (69.7%, 77.9% and 81.7%) with the rate 30, 40 and 50 larval /tree of C. undecimpunctata, respectively. While reduction percentage of adults of I. purchasi were (65.2%, 72.1% and 77.1%) with the same rate of release. The obtained average of reduction percentage of nymphs of I. purchasi were (58.6%, 65.5% and 70.5%) with the rate 30, 40 and 50 larval /tree of C. carnea, respectively.  Also, average of reduction percentage of adults of I. purchasi were (36.6%, 43.7% and 52.6%) with the rate 30, 40 and 50 larval /tree, of C. carnea respectively.The regression equation indicated that there was a highly positive relationship between the rate of release of C. undecimpunctata & C. carnea and reduction percentages for nymphs and adults stage of I. purchasi. The statistical analysis assured that there was a significant increase in the reduction percentage of nymphs and adults of I. purchasi at different rate of release second larval of C. undecimpunctata and C. carnea.

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Journal of Plant Protection and Pathology
Volume 12, Issue 2
February 2021
Pages 107-110

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