Assessment of yield losses due to the natural Infestation of tomato, Lycopersicon esculentum Mill, by the leafminers, Liriomyza spp. in Central Sudan
The leafminer (LM), Liriomyza spp. (Diptera: Agromyzidae) is known to attack tomato crops in the Gezira all year around. The effect of such infestation was not tackled researches in the Sudan. This study was done at the Experimental Farm of the Faculty of Agricultural Sciences, University of Gezira on the tomato variety Peto 86 (season 1996/97) and the breeding line Wad El-Obaid (season 1997/98). One experiment was conducted for each. Two treatments (i.e. insecticide-treated and untreated) were laid out in a RCB design with six replicates. The untreated plots were left to the LMs natural infestation, while the treated plots were protected by the IGR Trigard 75% WP. Highly significant differences (P<0.01) in percentage of leaf infestation were correlated with the highly significant differences in yield between treated and untreated plots. Differences in leaf infestation of ca. 48% in plots of the tomato variety Peto 86 resulted in a yield loss of approximately 44%, compared to 43% loss in yield of Wad El-Obaid, where the percentage of leaf infestation was ca. 56%. Therefore, it is recommended that tomato crop should be treated with insecticides to reduce the effect of the LMs. (Texte intégral)
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
African Association of Insect Scientists
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| Subjects: | H10 - Ravageurs des plantes, Solanum lycopersicum, Liriomyza, http://aims.fao.org/aos/agrovoc/c_4475, http://aims.fao.org/aos/agrovoc/c_4380, http://aims.fao.org/aos/agrovoc/c_7497, |
| Online Access: | http://agritrop.cirad.fr/553810/ http://agritrop.cirad.fr/553810/1/document_553810.pdf |
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