HEIKAL, I., IBRAHIM, G., EL-SAYED, K., EL-GHOBASHY, M. (2003). BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH IN STRAWBERRIES OPEN FIELDS AND GREENHOUSES BY RELEASING PHYTOSEIULUS MACROPILIS (B A N KS) (ACARI : TETRANYCHIDAE & PHYTOSEIIDAE). Egyptian Journal of Agricultural Research, 81(4), 1595-1608. doi: 10.21608/ejar.2003.287687
IBRAHIM H. HEIKAL; GAMAL A. IBRAHIM; KARAM M. EL-SAYED; MONA S. EL-GHOBASHY. "BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH IN STRAWBERRIES OPEN FIELDS AND GREENHOUSES BY RELEASING PHYTOSEIULUS MACROPILIS (B A N KS) (ACARI : TETRANYCHIDAE & PHYTOSEIIDAE)". Egyptian Journal of Agricultural Research, 81, 4, 2003, 1595-1608. doi: 10.21608/ejar.2003.287687
HEIKAL, I., IBRAHIM, G., EL-SAYED, K., EL-GHOBASHY, M. (2003). 'BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH IN STRAWBERRIES OPEN FIELDS AND GREENHOUSES BY RELEASING PHYTOSEIULUS MACROPILIS (B A N KS) (ACARI : TETRANYCHIDAE & PHYTOSEIIDAE)', Egyptian Journal of Agricultural Research, 81(4), pp. 1595-1608. doi: 10.21608/ejar.2003.287687
HEIKAL, I., IBRAHIM, G., EL-SAYED, K., EL-GHOBASHY, M. BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH IN STRAWBERRIES OPEN FIELDS AND GREENHOUSES BY RELEASING PHYTOSEIULUS MACROPILIS (B A N KS) (ACARI : TETRANYCHIDAE & PHYTOSEIIDAE). Egyptian Journal of Agricultural Research, 2003; 81(4): 1595-1608. doi: 10.21608/ejar.2003.287687
BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH IN STRAWBERRIES OPEN FIELDS AND GREENHOUSES BY RELEASING PHYTOSEIULUS MACROPILIS (B A N KS) (ACARI : TETRANYCHIDAE & PHYTOSEIIDAE)
Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
Abstract
Biological control of Telranychus urticae Koch (Acari : Tetranychidee) on strawberries was investigated in open fields in three Egyptian Governorates by releasing the predatory mite. Phytoseiulus macropilis (Banks) (Acari : Phytoseiidae), at a rate of about 5 individuals/ bit. (i.e. 100000 predators/feddan). More experiments were carried out in Ismailia Governorate for releasing the predator to control the T. unite° population in plastic greenhouses and also release the predator in an open field with the rate of about 3 individuals/bit (i.e. 60000 individuals/ feddan). The percent reduction of T. urticae population reached more than 90 % after six weeks from release at Ismailia Governorate, while reached this level early in the fifth week at Qualubia and Sharkia Governorates. This was probably due to the low pest population at the time of release. The T. urticae reduction in the greenhouses reached more than 90 % in the sixth or seventh week of release. However, the pest and predator densities showed a tendency to increase in the greenhouses than those in open fields which could be attributed to the warmer ternperature inside the greenhouse. The minimal release of the predator could maintain the pest population under relatively low level, yet the two-spotted spider mite outbreaks areas (hot spots) were occasionally observed in the released areas where additional predator release should be done. Results indicated the possibility of controlling the two-spotted spider mite. T. urticae on strawberries in open fields and plastic greenhouses by releasing the predatory mite. P. mac.ropilis with the rate of about 5 predators/bit.