Daniel Hulbert

• PhD
• Michigan State University

The phylogenetic relationships of Tephritis Latreille, one of the largest genera of true fruit flies, are poorly understood due to the large number of species, lack of reliable morphological characters and difficulties in identification. In the present study we used two datasets to address these problems: one with 35 species of the genus Tephritis...

Soil columns were collected from a blueberry field, and insecticide solutions were allowed to leach through these columns. Insecticides from four different chemical classes were applied at two different rates: the concentration at which the insecticides wash off blueberries under rainfall conditions and the labeled field rate at which they are spra...

Flies in the genus Rhagoletis (Diptera: Tephritidae) are economically important fruit pests, which also serve as models for studying modes of speciation and coevolution with their hymenopteran parasitoids. We describe the morphology of Rhagoletis bushi n. sp., and its geographic distribution, host association, phylogenetic relationships, and identi...

Semi-field studies were used to evaluate the effects of rainfall and field ageing on the performance of insecticides from six different chemical classes used to control the codling moth (Lepidoptera: Tortricidae). All insecticides were significantly more toxic to codling moth larvae than the untreated control, although seven-day field ageing reduce...

Host shifts by specialist insects can lead to reproductive isolation between insect populations that use different hosts, promoting diversification. When both a phytophagous insect and its ancestrally-associated parasitoid shift to the same novel host plant, they may cospeciate. However, because adult parasitoids are free-living, they can also colo...

Rhagoletis juniperina Marcovitch (Diptera: Tephritidae) infests Eastern Red Cedar (Juniperus virginiana L.) and other North American junipers. While several Rhagoletis species are of interest as orchard crop pests (apple maggot, blueberry maggot, cherry fruit fly) and as models for studying speciation (R. pomonella Walsh species group), R. juniperi...

Flies in the genus Rhagoletis (Diptera: Tephritidae) are of importance economically, and also serve as models for studying modes of speciation and coevolutionary relationships with their braconid (egg, larval) and diapriid (pupal) parasitoids. Bush’s (1966) seminal taxonomic work placed the North American Rhagoletis species into five species groups...

Field-based bioassays were used to determine the relative impact of rainfall on the relative toxicity of four insecticides, phosmet, carbaryl, zeta-cypermethrin, or imidacloprid, from different chemical classes on adult Japanese beetles, Popillia japonica Newman, in highbush blueberries, Vaccinium corymbosum L. Bioassays were set up 24 h after spra...

Japanese beetle (Popillia japonica Newman) is an invasive pest that poses substantial risks to growers of blueberries (Vaccinium spp.) in the Midwest. Damage by Japanese beetle adults mainly takes the form of mechanical damage on leaves and directly on the fruit. The purpose of this study was to determine the impact of precipitation on the efficacy...

Field-based bioassays and residue profile analysis were used to determine the relative toxicity, rainfastness, and field degradation over time of five insecticides from five insecticide classes on adult Japanese beetles, Popillia japonica Newman (Coleoptera: Scarabaeidae), in grapes, Vitis labrusca L. Bioassays assessed Japanese beetle condition as...

Japanese beetle (Popillia japonica Newman) is an invasive pest that poses substantial risks to growers of Grapes (Vitus spp.) in the Midwest. Damage by Japanese beetle adults mainly takes the form of mechanical damage on leaves, but they may also feed directly on the fruit. The purpose of this study was to determine the impact of precipitation and...