Abstract
Whitefly (Bemisia tabaci, Homoptera: Aleyrodidae) and aphid (Homoptera) on tomato (Solanum lycopersicum L.) are economically important insect pests that are difficult to manage due to their resistance to a wide range of chemical pesticides. Field experiments were conducted to assess the effects of fermented plant extracts of neem (Azadirachta indica A. Juss.) leaf and wild garlic (Tulbaghia violacea) on whitefly and aphid population. The population of both insect pests showed two different patterns with higher counts observed during summer than winter monitoring. During both seasons, numbers of whiteflies and aphids increased regardless of the treatment, but the numbers remained significantly lower within treated than untreated plots. The mixture of neem and wild garlic was more effective in reducing population densities of whitefly and aphid than either plant extract applied alone. In conclusion, results of this study suggested a synergistic effect of fermented plant extracts of neem and wild garlic as a bio-pesticide. Key words: Aphid, bio-pesticide, fermented plant extract (FPE), Solanum lycopersicum, whitefly
Highlights
(Bemisia tabaci, Homoptera: Aleyrodidae) and aphid (Myzus persicae, Homoptera: Aphidae), obligates phloem-feeding insects, are two economically important pests affecting tomato (Solanum lycopersicum) production, both under protected and field conditions
(Bemisia tabaci, Homoptera: Aleyrodidae) and aphid (Homoptera) on tomato (Solanum lycopersicum L.) are economically important insect pests that are difficult to manage due to their resistance to a wide range of chemical pesticides
The objective of the study was to investigate the efficacy of fermented plant extracts (FPE) of neem leaf and wild garlic on populations of whitefly and aphid in tomato production under field conditions
Summary
(Bemisia tabaci, Homoptera: Aleyrodidae) and aphid (Myzus persicae, Homoptera: Aphidae), obligates phloem-feeding insects, are two economically important pests affecting tomato (Solanum lycopersicum) production, both under protected and field conditions. Adults of these insects suck cell contents of infested plants and while feeding, excrete huge amounts of honeydew that eventually promotes development of sooty mould, which reduces the photosynthetic efficiency of the plant (Jazzar and Hammad, 2003).
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