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Study of the Population Dynamics of the Olive Fly, Bactrocera oleaeRossi. (Diptera, Tephritidae) in the Region of Essaouira

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Open Journal of Ecology 2015年第5期5卷 174-186页

作者： Abdellaziz Ait Mansour Kholoud Kahime Mohammed Chemseddine Ali Boumezzough Laboratory of Ecology and Environment (URAC 32 CNRST ERACNERS 06) Faculty of Sciences Semlalia Cadi Ayyad University Marrakesh Morocco

The Bactrocera oleae Rossi fly is the most important olive pest. It is of major economic importance in the olive production area of Essaouira, where weather conditions are optimal for the conduct of the various stages of its life cycle. The lack of phytosanitary treatments worsens this situation. The development of the larval stages and different generations are related to the phenological stages of the olive and are controlled by changes in habitat conditions. Trapping of adult males by Deltas traps baited with sex pheromone, at the four study sites, has identified some characteristics of the evolution of the adult populations’ flight dynamics. Our main results show a decreasing gradient of early emergences of different stages from the coast to the continental areas as well as the absence of the summer generation at the inner station. Soil analysis in the two stations showed that the hypogenous pupae wintering in the soil survive until June. Knowledge of the factors involved in the bio-ecology of the olive fly and the phenology of the host allows the elaboration of monitoring/ warning calendars, and phytosanitary measures in order to establish an IPM program adapted to the requirements of olive orchards in the region.

关键词： Bactrocera oleae Dynamics Generation Coastline Morocco

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Insecticidal Activity of an Indian Botanical Insecticide ULTRA ACT&#174 against the Olive Pest Bactrocera oleae(Diptera: Tephritidae) in Tunisia

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Advances in Chemical Engineering and Science 2020年第1期10卷 69-80页

作者： Imen Blibech Mohieddine Ksantini Manohar Shete

Bactrocera oleae is the most economically damaging insect of olive in the Mediterranean. As a reliable alternative to synthetic chemical insecticides, botanical pesticides from plant extracts are also considered natural control methods safe for the environment and human health. In practical applications up to date, studies demonstrating toxically effects of biological control agents on the insect have been carried out in organic farming systems based on some industrial microbial formulations. But much less attention has been given to botanical insecticides against B. oleae. Thus, a certified botanical insecticide issue from various plants and approved per Indian and International organic standards was tested against larvae and pupae of the olive pest Bactrocera oleae in the east of Tunisia under laboratory conditions. The experiments were conducted with 3 normal treatments and 1 control. Two techniques were used for larvae and pupae: direct contact using concentration from 0.5;0.750;1 and 1.5 mg/l and fumigation treatment using 2 mg/l conducted in rectangular boxes (25°C - 27°C, 75% - 85% RH and 14:10 LD photo period). For larval stages, LC50 and LC90 values for Ultra-Act were 0.45 and 1.22 mg/L in direct contact and 1.5 - 2 mg/l with fumigation, respectively. For pupal stage, the ID25 and ID50 values were estimated to be 0.71 mg and 1.26 mg respectively corresponding to the inhibition of emergence of 25% and 50% of B. oleae adults from pupa. Our results indicate that sprayed Ultra-Act product has the potential to control the three olive fly instar larvae. Pupal emergency was decreased significantly with fumigation treatment. In conclusion, Ultra-Act is a promising botanical insecticide against B. oleae that could be used as a successful alternative for chemicals in integrated control methods of this pest in Tunisia.

关键词： Olive Insect Pest Bactrocera oleae Indian Botanical Insecticide Ultra-Act In-secticidal Activity Contact Fumigation

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Insecticidal Activity of Bacillus thuringiensison Larvae and Adults of Bactrocera oleae Gmelin(Diptera:Tephritidae)

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Journal of Environmental Protection 2013年第5期4卷 480-485页

作者： Faiza Ilias Nassira Gaouar Kanza Medjdoub Mireille Kallassy Awad Faculty of Science Saint- Joseph University Beirut Lebanon Laboratory of Ecology and Management of Natural Ecosystems Tlemcen University Tlemcen Algeria

The olive fruit fly Bactrocera oleae is a major olive pest in Algeriaand other Mediterranean countries. Its attacks, in some cases, seriously compromised production. Bacillus thuringiensis is a spore-forming soil bacterium which produces a protein crystal toxic to some insects. The objective of this study was to search for isolates toxic to larvae and adults of B. oleae. Four doses test were performed on neonate larvae, second instar larvae and third instar larvae. Seven Bt strains examined, showed highest toxicity levels against adults. 86% mortality was observed against neonate larvae after 7 days of application by Bt toxin isolate. The mortality of the second instar larvae was 65% mortality at dose of 108 UFC/mL. The third instar larvae was very susceptible to Bt strain with 70% of mortality. This study demonstrated that some local Algerian B. thuringiensis isolates exhibit toxic potential that could be used to control B. oleae.

关键词： Bacillus thuringiensis Bactrocera oleae Insecticidal Activity Olive fly Diptera

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