INFLUENCE OF TEMPERATURE AND RELATIVE HUMIDITY ON THE BIOLOGY AND LIFE TABLE PARAMETERS OF PHYLLOCOPTRUTA OLE1VORA AND ACULOPS PELEKASSI (ACARI: ERIOPHYIDAE) ON

EBRAHIM, HUSSIEN M. I.

doi:10.21608/ejar.2000.321509

INFLUENCE OF TEMPERATURE AND RELATIVE HUMIDITY ON THE BIOLOGY AND LIFE TABLE PARAMETERS OF PHYLLOCOPTRUTA OLE1VORA AND ACULOPS PELEKASSI (ACARI: ERIOPHYIDAE) ON "HAMLIN" ORANGE IN CENTRAL FLORIDA

Document Type : Original Article

Author

HUSSIEN M. I. EBRAHIM

Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

10.21608/ejar.2000.321509

Abstract

The influence of temperature and relative humidity on life table parameters of Phyllocoptruta ofeivora (Ashmead) CRM and Aculops pelekassi (Keifer) PRM was determined in outside condition tests. Both eriophyoid mites developed and reproduced readily when fed on "Hamlin" orange Citrus sinensis (L.). Life table parameters were calculated at 17°C and 78% RH; 22°C and 75% RH; 27°C and 77% RH for PRM and continue to 30°C and 84% RH; and 32°C and 88% RH for CRM. The developmental time for female immature stages averaged 3.210.673 days at 32°C, with the intrinsic rate of increase (^rm) value of 0.350 for CRM; and 6.411.122 days at 27°C, with the intrinsic rate of increase (rm) values of 0.192 for PRM. The time threshold of development was 11⁰C and oviposition ceased at 10⁰C for both eriophyoid mites. Mortality from egg to adult stages was high (53.06%) at 17°C and decreased to 25.81% and 26% at 30°C and 32°C for CRM, respectively, while, the opposite occurred with PRM, the highest mortality was 48.59% at 27⁰C and decreased to 32.25% at 17°C. The optimum temperature for CRM to develop and increase on "Hamlin" orange was 30°C to 32°C, while, that for PRM was 22°C to 27°C.