Next generation biological control – an introduction
Hesran, Sophie Le; Ras, Erica ; Wajnberg, Eric ; Beukeboom, Leo W. - \ 2019
Entomologia Experimentalis et Applicata 167 (2019)7. - ISSN 0013-8703 - p. 579 - 583.
antagonistic micro-organisms - artificial selection - biocontrol - efficacy improvement - experimental evolution - genetic variation - induced plant resistance - molecular tools - natural enemies - parasitoids - pathogens - predators
Improving the efficiency of augmentative biological control with arthropod natural enemies : A modeling approach
Plouvier, Wouter N. ; Wajnberg, Eric - \ 2018
Biological Control 125 (2018). - ISSN 1049-9644 - p. 121 - 130.
Behavioral ecology - Cost efficiency - Genetic algorithm - Individual-based model - Life-history traits - Natural enemies
A better understanding of the life-history traits of biocontrol agents and their effect on population dynamics is key to obtaining more efficient pest control and generating higher economic returns for biocontrol practitioners. To this end, we constructed an optimality simulation model based on principles of the behavioral ecology of natural enemies. This model allows for the identification of the most important life-history traits of natural enemies (e.g., fecundity, longevity, attack rate, competition and dispersal), taking into account the costs and benefits for biocontrol practitioners. The model was kept general and was designed in such a way that it can be adapted to different target species and their specific ecology (natural enemy-pest-plant combination). Results indicate strong interactions between the optimized life-history traits of the biocontrol agents. Two different optimized life-history strategies for the agents were found with higher potential economic returns. These strategies differ most significantly in the plant-leaving decision and host handling time of the biocontrol agent, but also in their respective fecundity, longevity and dispersal ability. The preferred strategy depends on the number of agents released and the growth rate of the plant. Information from these optimality models can help to determine which agents should be released and how they should be released in a specific agro-ecological situation.
Optimal Resource Allocation to Survival and Reproduction in Parasitic Wasps Foraging in Fragmented Habitats
Wajnberg, E. ; Coquillard, P. ; Vet, L.E.M. ; Hoffmeister, T. - \ 2012
PLoS ONE 7 (2012)6. - ISSN 1932-6203
marginal value theorem - patch-leaving strategies - random arrival times - egg limitation - genetic algorithms - life-history - evolutionary argument - behavioral ecology - biological-control - asobara-tabida
Expansion and intensification of human land use represents the major cause of habitat fragmentation. Such fragmentation can have dramatic consequences on species richness and trophic interactions within food webs. Although the associated ecological consequences have been studied by several authors, the evolutionary effects on interacting species have received little research attention. Using a genetic algorithm, we quantified how habitat fragmentation and environmental variability affect the optimal reproductive strategies of parasitic wasps foraging for hosts. As observed in real animal species, the model is based on the existence of a negative trade-off between survival and reproduction resulting from competitive allocation of resources to either somatic maintenance or egg production. We also asked to what degree plasticity along this trade-off would be optimal, when plasticity is costly. We found that habitat fragmentation can indeed have strong effects on the reproductive strategies adopted by parasitoids. With increasing habitat fragmentation animals should invest in greater longevity with lower fecundity; yet, especially in unpredictable environments, some level of phenotypic plasticity should be selected for. Other consequences in terms of learning ability of foraging animals were also observed. The evolutionary consequences of these results are discussed.
|Multitrophic interactions and parasitoid behavioural ecology
Vet, L.E.M. ; Godfray, H.C.J. - \ 2007
In: Behavioral Ecology of Insect Parasitoids from Theoretical Approaches to Field Applications / Wajnberg, E., Bernstein, C., van Alphen, J., Oxford : Wiley-Blackwell - ISBN 9781405163477 - p. 231 - 252.
|Parasitoid fitness: from a simple idea to an intricate concept
Baalen, M. van; Hemerik, L. - \ 2007
In: Behavioral Ecology of Insect Parasitoids: From theoretical approaches to field applications / Wajnberg, E., Bernstein, C., van Alphen, J., Oxford, UK : Wiley-Blackwell - ISBN 9781405163477 - p. 31 - 50.
|Insect Biological Control and Non-target Effects : a European Perspective
Lynch, L.D. ; Hokkanen, H.M.T. ; Babendreier, D. ; Bigler, F. ; Burgio, G. ; Gao, Z.H. ; Kuske, S. ; Loomans, A. ; Menzler-Hokkanen, I. ; Thomas, M.B. ; Tommasini, G. ; Waage, J.K. ; Lenteren, J.C. van; Zeng, Q.Q. - \ 2001
In: Evaluating Indirect Ecological Effects of Biological Control / Wajnberg, E., Scott, J.K., Quimby, P.C., CABI Publishing - ISBN 9780851994536 - p. 99 - 125.
|Heterotrophic parasitoids revisited: preliminary observations on Encarsia porteri (Mercet) (Hymenoptera: Aphelinidae).
Polaszek, A. ; Stouthamer, R. ; Hunter, M.S. ; Rose, M. ; Ovruski, S.M. ; Frias, E. ; Rojas, S.P. - \ 1995
In: Proc. 4th Int. Symp. on Trichogramma and other egg parasitoids, 1994 Cairo, Egypt, E. Wajnberg (ed.). Les Colloques, INRA 73. Paris - p. 31 - 32.
|Analysis of Portuguese Trichogramma spp. (Hym., Trichogrammatidae) using ITS-rDNA and RAPDs.
Silva, I.M.M.S. ; Kan, F.J.P.M. van; Lenteren, J.C. van; Stouthamer, R. - \ 1995
In: Proc. 4th Int. Symp. on Trichogramma and other egg parasitoids, 1994 Cairo, Egypt, E. Wajnberg (ed.). Les Colloques, INRA 73. Paris - p. 38 - 39.
|Systematics of the Trichogrammatidae with emphasis on Trichogramma.
Pinto, J.H. ; Stouthamer, R. - \ 1994
In: Biological control with egg parasitoids / Wajnberg, E., Hassan, S.A., - p. 1 - 36.
Genetic variability in the reactive distance in Trichogramma brassicae after automatic tracking of the walking path.
Bruins, E.B.A. ; Wajnberg, E. ; Pak, G.A. - \ 1994
Entomologia Experimentalis et Applicata 72 (1994). - ISSN 0013-8703 - p. 297 - 303.