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Volume Volume 74 (1996)
EL-KHAWALKA, M., OMAR, M., AL-BELTAGY, A. (1996). EFFECT OF PHEROMONE AND INSECTICIDE APPLICATIONS ON THE POPULATION DENSITIES OF THE RED SPIDER MITE TETRANYCHUS CUCURBITACEARUM AND ITS PREDATOR ORIUS SP. IN COTTON FIELDS. Egyptian Journal of Agricultural Research, 74(1), 393-51. doi: 10.21608/ejar.1997.427314
MOHAMED H. EL-KHAWALKA; MOSTAFA E. OMAR; ABDALLAH M. AL-BELTAGY. "EFFECT OF PHEROMONE AND INSECTICIDE APPLICATIONS ON THE POPULATION DENSITIES OF THE RED SPIDER MITE TETRANYCHUS CUCURBITACEARUM AND ITS PREDATOR ORIUS SP. IN COTTON FIELDS". Egyptian Journal of Agricultural Research, 74, 1, 1996, 393-51. doi: 10.21608/ejar.1997.427314
EL-KHAWALKA, M., OMAR, M., AL-BELTAGY, A. (1996). 'EFFECT OF PHEROMONE AND INSECTICIDE APPLICATIONS ON THE POPULATION DENSITIES OF THE RED SPIDER MITE TETRANYCHUS CUCURBITACEARUM AND ITS PREDATOR ORIUS SP. IN COTTON FIELDS', Egyptian Journal of Agricultural Research, 74(1), pp. 393-51. doi: 10.21608/ejar.1997.427314
EL-KHAWALKA, M., OMAR, M., AL-BELTAGY, A. EFFECT OF PHEROMONE AND INSECTICIDE APPLICATIONS ON THE POPULATION DENSITIES OF THE RED SPIDER MITE TETRANYCHUS CUCURBITACEARUM AND ITS PREDATOR ORIUS SP. IN COTTON FIELDS. Egyptian Journal of Agricultural Research, 1996; 74(1): 393-51. doi: 10.21608/ejar.1997.427314

EFFECT OF PHEROMONE AND INSECTICIDE APPLICATIONS ON THE POPULATION DENSITIES OF THE RED SPIDER MITE TETRANYCHUS CUCURBITACEARUM AND ITS PREDATOR ORIUS SP. IN COTTON FIELDS

Article 5, Volume 74, Issue 1, March 1996, Page 393-51  XML PDF (2.75 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1997.427314
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Authors
MOHAMED H. EL-KHAWALKA1; MOSTAFA E. OMAR2; ABDALLAH M. AL-BELTAGY1
1Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
2Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Saba‌hia, Alexandria, Egypt
Abstract
Two experiments were conducted in Beheira governorate to study the effect of pheromones and insecticides application, which are used for pink bollworm control on the population density of the red spi‌der mite Tetranychus cucurbitacearum and the predator Onus sp. One of these experiments was carried out in Safasif region to study the effect of time of cultivation under pheromone application. The data revealed that the numbers of mite and its predator were highly affected by time of cultivation and reached their peak around June 20. The other experi‌ment was conducted in Abaadia region to study the effect of 12 differ‌ent insecticide treatments. The data indicated a fluctuation in the re‌sults which might be due to the sensitivity of the mite and its predator to some chemicals, the residulal effect of such chemicals, levels of toler‌ance of the mite and its predator and the time of spray. In the pheromone area, the ratio of the number of the mite to its predator was 51.76, while this ratio in the insecticidal area was 130.07. This demonstrated the drastic effect of insecticides on reducing the number of the predator Onus sp. It was observed that the number of the mite was greater around the border than inside the field, but the number of the predator was about equal inside the field and around the border .
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