Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.
Thabet, A. (2000). Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.. EKB Journal Management System, 8(1), 31-40. doi: 10.21608/jpces.2000.460475
A. A. M. Thabet. "Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.". EKB Journal Management System, 8, 1, 2000, 31-40. doi: 10.21608/jpces.2000.460475
Thabet, A. (2000). 'Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.', EKB Journal Management System, 8(1), pp. 31-40. doi: 10.21608/jpces.2000.460475
Thabet, A. Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.. EKB Journal Management System, 2000; 8(1): 31-40. doi: 10.21608/jpces.2000.460475

Toxicity of some natural products against the adult stage of brown bark aphid, Pterochloroides persicae and whitefly, Bemisia tabaci under laboratory conditions.

Journal of Pest Control and Environmental Sciences
Volume 8, Issue 1, April 2000, Pages 31-40    PDF (1.49 M)
Document Type: Original Article
DOI: 10.21608/jpces.2000.460475
Author
A. A. M. Thabet*
Department of Plant Protection, Faculty of Agriculture Sana'a University, Republic of Yemen
Abstract
A major study that needs to be carried out present different options alternative in the form of pesticides management. Three plants collected from locations throughout Yemen, namely Neem, indica; Sodom Apple, Calotropis procera and Africa Rue, Peganum harmala were assayed against adults’ stage of two sucking insects commonly present in Yemen environment. The brown bark aphid, Pterochloroides persicae (Cholodk) and the whitefly, Bemisia labaci (Genn.) are serious insects of some fruit and vegetable plants in Yemen. The bioassay based on exposure the adult of both insects to discs and tomato seedling, which were dipped in the plant extract. Mortalities were recorded at 24 and 48 hours aner treatment according to the LC50 values. Neem extract showed the highest insecticidal activity against P. persicae followed by Sodom Apple and Hannala extracts after 48 hr of treatment. The LC50 values were 64.94, 110.34 and 1880.89 ppm, whereas 24 hr LC50 values were 95.36, 210.70 and 1900.11 ppm, respectively. It was found that B. tabaci adult was more susceptible than P. persicae. The extract of Neem gave the highest toxicity against the adult of B. labaci followed by Sodom Apple and African Rue at 24 and 48 hr. The LC50 values were 52.48, %.86 and 155.42 ppm during the initial 24 hr exposure period, whereas 48 hr LC50 were 8.93, 12.86 and 33.42 ppm, respectively. The present study suggests that natural agents, such as these suitable plant extracts, have the advantage of efficiency, highly selective, suitable for use in programs for integrated pest management, high mammalian safety, low costs and biodegradable to non-toxic products.
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