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The interactions between the cowpea aphid Aphis craccivora Koch, its parasitoid Lysiphlebus testaceipes Cresson and hyperparasitoid Syrphophagus africanus Gahan were assessed in the laboratory. Host age preference for hyperparasitism was evaluated using parasitized aphids of different ages (i.e. ...


Ganyo, K.K.Tounou, A.K.Agboton, C.Dannon, E.A.Pittendrigh, Barry R.Tamo, M.[Interaction between the aphid parasitoid Lysiphlebus testaceipes (Hymenoptera: Aphidiidae) and its hyperparasitoid Syrphophagus africanus (Hymenoptera: Encyrtidae)]Interaction between the aphid parasitoid Lysiphlebus testaceipes (Hymenoptera: Aphidiidae) and its hyperparasitoid Syrphophagus africanus (Hymenoptera: Encyrtidae)

The unmitigated pest risk potential for the importation of Pinus and Abies logs from all states of Mexico into the United States was assessed by estimating the probability and consequences of establishment of representative insects and pathogens of concern. Twenty-two individual pest risk assessm...


Tkacz, B.M.Burdsall Jr., H.H.DeNitto, G.A.Eglitis, AndrisHanson, J.B.Kliejunas, J.T.O'Brien, J.G.Smith, E.L.Wallner, W.E.[Pest risk assessment of the importation into the United States of unprocessed Pinus and Abies logs from Mexico]Pest risk assessment of the importation into the United States of unprocessed Pinus and Abies logs from Mexico

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