Biological Control Using Some Predators for Tomato Pests Under Greenhouse Conditions | ||||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||||
| Article 15, Volume 13, Issue 1, March 2020, Page 165-171 PDF (545.15 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsa.2020.77334 | ||||
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| Authors | ||||
| Iman I. Imam1; Mohamed A. Nawar2 | ||||
| 1Economic Entomology Unit, Plant Protection Department, Desert Research Center | ||||
| 2Animal Pest Unit, Plant Protection Department, Desert Research Center | ||||
| Abstract | ||||
| Bemisia tabaci Genn. (Hemiptera: Aleyrodidae) and Tetranychus urticae Koch. (Acari: Tetranychidae) are major pests in tomato greenhouses. The combination and different release regimes of 2 predators; Chrysoperla carnea (Steph.), and Phytoseiulus persimilis Athias- Henriot in commercial tomato greenhouses during the winter plantation of the two seasons, 2018 and 2019. five release rates were evaluated; 1 individuals of C. carnea + 2 individuals of P. persimilis /m2 biological control greenhouse 1 (1C / 2P), 2 individuals of C. carnea + 4 individuals of P. persimilis /m2 (2C/4P) , 4 individuals of C. carnea + 4 individuals of P. persimilis /m2 ( 4C/8P),1 Insect predator (C. carnea) only and 1 mite predator (P. persimilis). The greatest suppression of the pest population was recorded in 4C/8P (the combination of the 2 predators). The population of B. tabaci reached 3.3, 1, 1, 4.5 and 0.5 individuals/ plant in 2018 and 5, 2, 1, 3.5 and 5 individuals/ plant in 2019 in 1C/2P, 2C/4P, 4C/8P, C. carnea and P. persimilis, respectively, in the 11th week. Correspondent population of T. urticae reached 2.2, 2, 1, 2.4 and 4 individuals/ plant in 2018 and 1, 2, 0.4, 4,6 and 4 individuals/ plant in 2019. There was a significant difference between 1C/2P, 2C/4P, 4C/8P, C. carnea and P. persimilis for the whitefly and mite populations. Generally, the pest populations in the 4C/8P decreased treatments compared with the P. persimilis in the two seasons. Use of the combination of the 2 predators (4C/8P) is recommended as a pest management practice at the plantation of tomato in the greenhouses. | ||||
| Keywords | ||||
| Bemisia tabaci. Tetranychus urticae; Phytoseiulus persimilis; Chrysoperla carnea; Predators; Tomato; Greenhouses | ||||
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