Comparative efficacy of neem, Azadirachta indica, extract for- mulations and the synthetic acaricide, Amitraz (Mitac), against the two spotted spider mites, Tetranychus urticae (Acari: Tetra- nychidae), on tomatoes, Lycopersicum esculentum.

Makundi, Rhodes H.; Kashenge, Sophia

dc.creator	Makundi, Rhodes H.
dc.creator	Kashenge, Sophia
dc.date	2016-12-16T15:57:24Z
dc.date	2016-12-16T15:57:24Z
dc.date	2002
dc.date.accessioned	2022-10-25T08:50:53Z
dc.date.available	2022-10-25T08:50:53Z
dc.identifier	0340-8159
dc.identifier	https://www.suaire.sua.ac.tz/handle/123456789/1118
dc.identifier.uri	http://hdl.handle.net/123456789/90758
dc.description	Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz Journal of Plant Diseases and Protection 109 (1), 57-63, 2002, ISSN 0340-8159
dc.description	We evaluated the efficacy of commercial formulations of neem (Azadirachta indica) extracts against the two-spotted spider mites, Tetranychus urticae (Acari: Tetranychidae), on tomatoes and compared them with the synthetic acaricide, amitraz. The neem formulations showed variable levels of protection of tomatoes against infestation by T. urticae. Neemroc EC was the most effective and the level of protection was comparable to that of amitraz. The neem formulations, except Neemros WP, showed strong ovipositional deterrence of T. urticae and suppressed the emergence of nymphs on treated leaf discs. Repeated application of the neem formulations and amitraz led to significant reduction of the population size of mites on tomatoes, compared to the control. However, Neemroc EC was the most effective in reducing leaf damage, whereas Saroneem, Neemroc Combi and Neemros WP-treated tomatoes had high leaf damage ratings associated with lower fruit weight. The high performance of Neemroc EC is attributed to the oil content in this formulation, particularly when compared with Neemroc WP whose concentration of azadirachtin was very high and yet the effectiveness against mites was very low. Neemroc EC was as effective as the standard and therefore an alternative to amitraz for protecting tomatoes against infestation by T. urticae.
dc.format	application/pdf
dc.language	en
dc.publisher	Eugen Ulmer GmbH & Co., Stuttgart
dc.subject	Tetranychus urticae
dc.subject	Tomatoes
dc.subject	Neem (Azadiracta indica)
dc.subject	Oviposition deterrence
dc.subject	Neem- extracts formulations
dc.title	Comparative efficacy of neem, Azadirachta indica, extract for- mulations and the synthetic acaricide, Amitraz (Mitac), against the two spotted spider mites, Tetranychus urticae (Acari: Tetra- nychidae), on tomatoes, Lycopersicum esculentum.
dc.type	Article