Factors affecting inundative releases of Trichogramma minutum Ril. against the Spruce Budworm 1

@article{Smith1986FactorsAI,
  title={Factors affecting inundative releases of Trichogramma minutum Ril. against the Spruce Budworm 1},
  author={S. M. Smith and Martin Hubbes and J. Roderick Carrow},
  journal={Journal of Applied Entomology},
  year={1986},
  volume={101}
}
Inundative releases of Trichogramma minutum Riley for biological control of the spruce bud‐worm, Choristoneura fumiferana (Clemens), were investigated in Canada's boreal forest during 1982 and 1983. The most significant factors affecting the level of egg mass parasitism were the time of release, the density of the parasitoids, and the local weather conditions. Food supply to the female parasitoids, vertical location of the host egg mass in the stand, intensity of solar radiation, and density of… Expand
Experimental inundative releases of different strains of the egg parasite Trichogramma in Brussels sprouts
AbstractThe effectiveness of inundative releases of four strains of the egg parasiteTrichogramma (Hymenoptera, Trichogrammatidae) to control five lepidopterous species infesting Brussels sproutsExpand
BIOLOGICAL CONTROL WITH TRZCHOGRAMMA : Advances , Successes , and Potential of Their Use
Major contributions to the release of Trichogramma for biological control of lepidopterous pests have been made in the past 20 years. Most trials have used only five species of Trichogramma againstExpand
Influence of environmental conditions and parasitoid quality on field performance of Trichogramma minutum
TLDR
Quality parameters based on parasitoid biology were not effective for predicting field efficacy if poor weather conditions persisted after a release, but parameters such as release rate and fecundity in the lab were useful predictors of field performance. Expand
Simulated management of an historical spruce budworm population using inundative parasite release.
TLDR
The results suggest that some low and moderate populations of spruce budworm can be effectively managed using annual inundative releases of an egg parasite, particularly toward the end of the inclining phase of an outbreak, but when populations reach severe levels, additional mortality agents probably will have to be considered in an integrated approach. Expand
Patterns of Host Exploitation by the Parasitoid Wasp Trichogramma minutum (Hymenoptera: Trichogrammatidae) when Attacking Eggs of the Spruce Budworm (Lepidoptera: Tortricidae) in Canadian Forests
TLDR
Field patterns of host exploitation can help to predict what to expect from inundative release programs and, more important, to identify aspects that need to be enhanced so that a better level of control of spruce budworms can be achieved. Expand
Quality assessment of three species of commercially produced Trichogramma and the first report of thelytoky in commercially produced Trichogramma
Weekly shipments of Trichogramma pretiosum Riley, Trichogramma minutum Riley, and Trichogramma brassicae (Bezdenko) (Hymenoptera: Trichogrammatidae) from a single insectary were assessed to determineExpand
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TLDR
Results are consistent with infection by a parthenogenesis-inducing strain of Wolbachia, and three out of a subset of six of these females produced sons after being fed the antibiotic tetracycline. Expand
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TLDR
T. dendrolimi and T. japonicum appear to be promising candidates for augmentative release against C. suppressalis in northeastern China. Expand
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Abstract We monitored egg parasitism and larval populations of Pieris rapae (L.) and Trichoplusia ni (Hübner) in cabbage plots treated with point and broadcast releases of Trichogramma brassicaeExpand
OVIPOSITION PREFERENCE OF Plutella xylostella (Lepidoptera: Plutelidae) AND PARASITISM BY Trichogramma pretiosum (Hymenoptera: Trichogrammatidae) IN COLLARD GREEN
The damage caused by the diamondback moth is a limiting factor in the production of brassicaceous plants worldwide and biological control by an egg parasitoid may be an effective way to control thisExpand
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TLDR
In rearing adults of Trichogramma minutum Riley from eggs of the corn ear worm moth on corn during 1929, it was observed that the population of these parasites per host egg was variable and there was considerable variation in the size of the adult parasites. Expand
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TLDR
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Regression analyses indicated that parasitism rates rose with increasing density of nonbudworm host tree species, especially hardwoods such as sugar maple, and it appears that increases in parasitism are due to greater numbers of alternate parasite hosts found in more diverse habitats. Expand
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The effects of spatial differences in host density on parasitism of Heliothis zea (Boddie) eggs by Trichogramma spp. were investigated in cultivated soybean plots. H. zea egg density per leaf and theExpand
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Despite the apparent commonness of parasitoid aggregation in areas of high host density, positive spatial correlations between host density and the intensity of parasitism appear to be uncommon inExpand
Feasibility testing of inundative releases of Tricbogramma minutum against the spruce budworm
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Forest Insect and Disease Conditions in Ontario
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