UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES
ABDEL-SAMAD, M., EL-HALAWANY, M., EL-SAYED, K. (1996). UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES. EKB Journal Management System, 74(4), 1021-1034. doi: 10.21608/ejar.1996.431760
MAGDY A. ABDEL-SAMAD; MAHMOUD E. EL-HALAWANY; KARM M. EL-SAYED. "UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES". EKB Journal Management System, 74, 4, 1996, 1021-1034. doi: 10.21608/ejar.1996.431760
ABDEL-SAMAD, M., EL-HALAWANY, M., EL-SAYED, K. (1996). 'UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES', EKB Journal Management System, 74(4), pp. 1021-1034. doi: 10.21608/ejar.1996.431760
ABDEL-SAMAD, M., EL-HALAWANY, M., EL-SAYED, K. UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES. EKB Journal Management System, 1996; 74(4): 1021-1034. doi: 10.21608/ejar.1996.431760

UTILIZING EUSEIUS SCUTALIS (ATHIAS HENRIOT) TO CONTROL EUTETRANYCHUS ORIENTAL'S (KLEIN) ON CITRUS TREES

Egyptian Journal of Agricultural Research
Article 13, Volume 74, Issue 4, December 1996, Page 1021-1034  XML PDF (3.8 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1996.431760
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Authors
MAGDY A. ABDEL-SAMAD; MAHMOUD E. EL-HALAWANY; KARM M. EL-SAYED
Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
Experiments were carried out under field conditions to estimate the effect of the predatory mite, Euseius scutalis (A-H.) against citrus brown mite, Euterranychus orientalis (Klein) on citrus trees at El-Ismailia Governorate. The predatory mite E.scutalis was released on January 9, 1992 at 40-70 adult females per tree (according to the size of the tree) when infestation level of the prey citrus brown mite Eorientalis reached 4.2 per leaf of citrus. The percentage reduction of prey popula­tion density was 82.88 after 12 months of release, then decreased to 52.46% after 21 months. So, it was felt necessary to carry out the sec­ond release of E.scutalis on November 25, 1993 when the infestation with moving stages of Eonentalis reached 4.9 individuals per leaf. The reduction percentage of E.orientalis after 13 months from the second release of the predatory mite was 70.19%. To serve the biological con­trol programme, the side effect of three organophosphorus insecticides, two nematicides, six fungicides, two herbicides and neem wp were test­ed against the predator adult females under laboratory conditions. The side effect of 9 acaricides and some mineral oils were also tested agai­nst the predator motile stages under field conditions. All fungicides test­ed, neem wp, three acaricides (Vertimec, Cascade and Ortes) and miner­al oils were harmless to the predatory mite, E.scutalis. Thus, it is advisable to use these compounds in the programme of biological con­trol.
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