Journal ArticleDOI
Habitat Manipulation to Enhance Biological Control of Brassica Pests by Hover Flies (Diptera: Syrphidae)
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Border planting with P. tanacetifolia clearly affected numbers of adult hover flies and aphid populations, and the potential for this type of habitat manipulation to increase diversity as a component of integrated pest management is discussed with reference to comparable research in Europe.Abstract:
Brassicas in New Zealand are attacked by the cabbage aphid, Brevicoryne brassicae (L.); the green peach aphid, Myzus persicae (Sulzer); and the larvae of Artogeia rapae (L.) and the diamondback moth, Plutella xylostella (L.). Use of prophylactic pesticides is the usual control strategy against such pests, but the invertebrate predatory community within fields can contribute to pest suppression. Larvae of New Zealand hover flies consume all of the above pests, but the requirement of the adult flies for pollen and nectar may limit their potential in fields where the non crop flora is impoverished. In this work, parts of the borders of three cabbage fields were drilled with the annual plant P. tanacetifolia tanacetifolia Benth. (Hydrophyllaceae) as a pollen source in the spring. Four strips were alternated with 4 control strips (naturally occurring vegetation). Aphid and A. rapae populations were assessed weekly in unsprayed plots adjacent to the 8 replicated areas, and hover fly eggs were counted simultaneously. Hover fly adults were trapped in yellow pan traps that were arranged across the field in transects from each of the eight sampling areas. Border planting with P. tanacetifolia clearly affected numbers of adult hover flies and aphid populations. The potential for this type of habitat manipulation to increase diversity as a component of integrated pest management is discussed with reference to comparable research in Europe.read more
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Journal ArticleDOI
Habitat Management to Conserve Natural Enemies of Arthropod Pests in Agriculture
TL;DR: The rapidly expanding literature on habitat management is reviewed with attention to practices for favoring predators and parasitoids, implementation of habitat management, and the contributions of modeling and ecological theory to this developing area of conservation biological control.
Journal ArticleDOI
Sustainable pest regulation in agricultural landscapes: a review on landscape composition, biodiversity and natural pest control
TL;DR: It is concluded that diversified landscapes hold most potential for the conservation of biodiversity and sustaining the pest control function and similar contributions of these landscape factors suggest that all are equally important in enhancing natural enemy populations.
Journal ArticleDOI
Responses of invertebrate natural enemies to complex-structured habitats: a meta-analytical synthesis
TL;DR: The results of this meta-analysis support the view that basal resources mediate top-down impacts on herbivores, and provide encouragement that manipulations of habitat complexity can be made in agroecosystems that will enhance the effectiveness of the natural enemy complex for more effective pest suppression.
Journal ArticleDOI
Maximizing ecosystem services from conservation biological control: the role of habitat management.
TL;DR: It is concluded that addressing ‘stacked’ ecosystem services with multiple ecosystem service goals can decrease agriculture’s dependence on ‘substitution’ methods such as the current reliance on oil-based agro-chemical inputs.
Journal ArticleDOI
The conflicting relationships between aphids and men: a review of aphid damage and control strategies.
TL;DR: The main control strategies are reviewed in the light of an integrated pest management approach for cereal aphids, which are among the most important in Europe as direct feeders and virus vectors.
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