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Titre : Identification, Monitoring and Control of the Fruit Fly Bactrocera invadens (Drew, Tsuruta and White)(Diptera : Tephritidae) in Guava Orchards in Greater Wad Medani locality, Gezira State, Sudan

Auteur : Sulieman, Azmey Eizzeldeen Mohammed

Université de soutenance : University of Gezira

Grade : Master of Science (MS) in Pesticides and Toxicology 2013

Résumé
Fruit flies) Diptera : Tephritidae (are recently declared to be pests of national importance, as they cause extensive damage to several fruit and vegetable crops. This study was aimed to identify the prevailing species in Greater Wad Medani locality, Gezira State, Sudan, study the season abundance and fluctuations of Bactrocera invadens and other FF species, if present ; evaluate the performance of Deltamethrin (Decis®) 12.5% UL as a fogging treatment for controlling the adults in the orchards, evaluate the performance of neem seed powder extract (NSPE), when sprayed on the fruits before infestation and evaluate the performance of Methyl Eugenol and sticky traps for monitoring and control. The fieldwork was carried out in two locations (Hantoub and Gezirat-elfil), Greater Wad Medani locality, Gezira State, Sudan. Four orchards (one feddan each) were selected. Yellow sticky and Methyl Eugenol traps were used to collect and monitor FF species. Deltamethrin UL and NSPE were used against adults and immature stages, respectively. Deltamethrin was applied at three rates : (0.25, 0.5 and 1L/F) using a fogging machine. One orchard was selected and divided into 4 blocks ; each block contained three treatments in addition to the control. The fogging was repeated according to the population density. Ten fruits per tree were collected randomly and taken to the laboratory. Number of pupae per fruit and number of emerged adults were recorded. The same was adopted following treatment with two concentrations of NSPE(25 and 50 g/L of water). NSPE was applied every two weeks. The results revealed that all tested concentrations of Deltamethrin and NSPE significantly reduced the number of pupae and the number of emerged adults of B. invadens on treated fruits, compared to the control. Methyl Eugenol(ME) with Malathion® 57%EC proved effective and is recommended for controlling adults of B. invadens. The highest population of B. invadens was detected during July and September in Gezirat-elfil area), whereas the lowest population was found during July and August in Hantoub area. Deltamethrin and neem seed powder extract(NSPE) inhibited the emergence of B. invadens adults.

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