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

  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},
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
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.
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
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
Quality assessment of three species of commercially produced Trichogramma and the first report of thelytoky in commercially produced Trichogramma
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
Performance of four Chinese Trichogramma species as biocontrol agents of the rice striped stem borer, Chilo suppressalis, under various temperature and humidity regimes
T. dendrolimi and T. japonicum appear to be promising candidates for augmentative release against C. suppressalis in northeastern China. Expand
Comparison of Trichogramma brassicae (Hymenoptera: Trichogrammatidae) Augmentation with Organic and Synthetic Pesticides for Control of Cruciferous Lepidoptera
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


Variation in Populations and in Size of Adults of Trichogramma Minutum Riley Emerging from Eggs of Heliothis Obsoleta Fab.
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
Spruce budworm egg deposition spanned 27 days during both 1979 and 1980 and showed major reduction in host–egg acceptability occurred after the fifth day at 21 °C and after the 4th day at 27 °C. Expand
The Influence of Stand Factors on Parasitism of Spruce Budworm Eggs by Trichogramma minutum
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
Spatial Differences in Heliothis zea Egg Density and the Intensity of Parasitism by Trichogramma Spp. : an Experimental Analysis
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
Augmentation of Natural Enemies in Western Europe
The idea of using entomophagous species to contain pests is an old one and suggestions in this direction exist, for example, in the well known “Memoires pour servir a l’histoire des insectes” ofExpand
The Theoretical Basis for Augmentation of Natural Enemies
The success that has been achieved by the introduction and establishment of a wide range of parasites and predators for the control of alien pests is shown. Expand
Aggregation in field parasitoid populations: foraging time allocation by a population of Diadegma (Hymenoptera, Ichneumonidae)
While Diadegma may select and forage preferentially on plants with higher host density, they do not exhibit the tendency, predicted by some optional foraging models, to exploit progressively less profitable plants during a foraging bout. Expand
Spatial Variations in Host Density and the Intensity of Parasitism: Some Empirical Examples
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
  • Proc. Canusa Sympos. Sept 13-17,
  • 1984
Forest Insect and Disease Conditions in Ontario
  • 1983