The impact of water and nitrogen depletion on Aphis pomi infestation in the apple orchard and its relation with the useful fauna and ants.

Abstract : This work aims to establish an ecologically integrated strategy for pest management to assess the impact of water and nitrogen depletion on Aphis pomi infestation in the Apple orchard.The results of the study of the impact on the green Apple aphid show a significant effect on the availability of water and nitrogen on the level of Aphis pomi infestation. Indeed, the normal fertigation regime (T1 = 100%) proved to be more favorable to a prominent development of aphids, in comparison with a 25% water and nitrogen deficit regime (T2 = 75%), that minimize infestation. As for the evolution of wingless aphid and green aphid with wing, the Aphis pomi, at both regimes, the general shape of the evolution of winged curves looks like the one of the wingless ones, with small differences. The number of leaves was higher in the T1 regime than that of T2. Moreover, the study of the orientation effect on the infestation of aphids has shown that the North andthe West sides were more infested than the East and the South ones. A negative effect on Syrphesp and ChrysoperlaCarnea densities was noticed under water and nitrogen depletion.
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Journal of Materials and Environmental Science , Mohammed Premier University, 2018, 9 (1), pp.145-154. 〈10.26872/jmes.2018.9.1.18〉
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M. Laghfiri, I. Madani, A.J. Boutaleb, A. Blenzar, Marie Odile Jordan, et al.. The impact of water and nitrogen depletion on Aphis pomi infestation in the apple orchard and its relation with the useful fauna and ants.. Journal of Materials and Environmental Science , Mohammed Premier University, 2018, 9 (1), pp.145-154. 〈10.26872/jmes.2018.9.1.18〉. 〈hal-01652057〉

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