Single and Multiple Applications of Fenvalerate to Protect Western White Pine Cones from Dioryctria abietivorella (Lepidoptera: Pyralidae)1

1986 ◽  
Vol 79 (1) ◽  
pp. 158-161 ◽  
Author(s):  
Michael Haverty ◽  
Patrick J. Shea ◽  
Lawrence E. Stipe
Keyword(s):  
White Pine ◽  
Dioryctria Abietivorella ◽  
Western White Pine ◽  
Lepidoptera Pyralidae ◽  
Pine Cones

INSECTS AND MITES ASSOCIATED WITH WESTERN WHITE PINE BLISTER RUST CANKERS IN IDAHO

1972 ◽  
Vol 104 (11) ◽  
pp. 1713-1715 ◽  
Author(s):  
Malcolm M. Furniss ◽  
R. D. Hungerford ◽  
E. F. Wicker
Keyword(s):  
Bark Beetles ◽  
White Pine Blister Rust ◽  
Insect Infestation ◽  
White Pine ◽  
Blister Rust ◽  
Dioryctria Abietivorella ◽  
Western White Pine ◽  
Northern Idaho

AbstractInsects present in western white pine blister rust cankers in northern Idaho were: two weevils, Cylindrocopturus n. sp. and Pissodes sp. near swartzi Hopk.; two bark beetles, Pityophthorus sp. near nitidulus (Mann.), and Procryphalus ? sp.; a drosophilid fly, Paracacoxenus guttatus Hardy and Wheeler; and a phycitid moth, Dioryctria abietivorella (Grote). Mites associated with insect infestation were: Lasioseius ? n. sp., Ameroseius longitrichus Hirschmann, and Histiogaster arborsignis Woodring.

Protection of Disease-Resistant Western White Pine Seed from Insect Damage

1988 ◽  
Vol 3 (1) ◽  
pp. 18-20 ◽  
Author(s):  
Michael I. Haverty ◽  
Patrick J. Shea ◽  
Lawrence E. Stipe
Keyword(s):  
Seed Orchard ◽  
Insect Damage ◽  
Pinus Monticola ◽  
Botanical Insecticide ◽  
White Pine ◽  
Dioryctria Abietivorella ◽  
Western White Pine ◽  
Insect Populations ◽  
Repeated Applications ◽  
Seed Crops

Abstract Seed produced in blister rust-resistant western white pine (Pinus monticola Douglas) seed orchards is in high demand. The fir coneworm, Dioryctria abietivorella (Groté), and the lodgepole pine coneworm, Eucosma recissoriana (Heinrich), cause considerable damage to seed crops in the Moscow Arboretum seed orchard. Single (May or June) and repeated (May and June) applications of 0.025% fenvalerate, and repeated applications (May and June) of 0.0125% fenvalerate, a synthetic botanical insecticide, were evaluated in 1986 for protection of cone crops. Results in 1986 confirm results in 1984 (Haverty et al. 1986): an application of 0.025% fenvalerate in May and June significantly reduces insect damage, regardless of the relative abundance of cones or insects. The decision to use a single or repeated application depends on demand for seed, projected seed crop and insect populations, and socioeconomic costs of the treatment. West. J. Appl. For. 3(1):18-20, January 1988.

EFFICACY OF ESFENVALERATE FOR CONTROL OF INSECTS HARMFUL TO SEED PRODUCTION IN DISEASE-RESISTANT WESTERN WHITE PINES

1994 ◽  
Vol 126 (1) ◽  
pp. 1-5 ◽  
Author(s):  
N.G. Rappaport ◽  
M.I. Haverty ◽  
P.J. Shea ◽  
R.E. Sandquist
Keyword(s):  
Seed Production ◽  
Pinus Monticola ◽  
White Pine ◽  
Blister Rust ◽  
Dioryctria Abietivorella ◽  
Pine Cone ◽  
Leptoglossus Occidentalis ◽  
Insecticide Efficacy ◽  
Western White Pine ◽  
Normal Seed

AbstractWe tested the pyrethroid insecticide esfenvalerate in single, double, and triple applications for control of insects affecting seed production of blister rust-resistant western white pine, Pinus monticola Douglas. All treatments increased the proportion of normal seed produced and reduced the proportion of seed damaged by the western conifer seed bug, Leptoglossus occidentalis Heidemann. Only the triple application reduced the proportion of cones killed by the pine cone beetle, Conophthorus ponderosae Hopkins. Other seed-damaging insect species [seed chalcids, Megastigmus sp.; the fir coneworm, Dioryctria abietivorella (Grote); and seedworms, Cydia sp.] were present but in numbers too low to test for insecticide efficacy.

Western white pine development in relation to biophysical characteristics across different spatial scales in the Coeur d'Alene River basin in northern Idaho, U.S.A.

2002 ◽  
Vol 32 (7) ◽  
pp. 1109-1125 ◽  
Author(s):  
Theresa B Jain ◽  
Russell T Graham ◽  
Penelope Morgan
Keyword(s):  
River Basin ◽  
Spatial Scales ◽  
Pinus Monticola ◽  
White Pine ◽  
Basal Diameter ◽  
Landscape Characteristics ◽  
Coeur D'alene ◽  
Biophysical Factors ◽  
Western White Pine ◽  
Northern Idaho

Many studies have assessed tree development beneath canopies in forest ecosystems, but results are seldom placed within the context of broad-scale biophysical factors. Mapped landscape characteristics for three watersheds, located within the Coeur d'Alene River basin in northern Idaho, were integrated to create a spatial hierarchy reflecting biophysical factors that influence western white pine (Pinus monticola Dougl. ex D. Don) development under a range of canopy openings. The hierarchy included canopy opening, landtype, geological feature, and weathering. Interactions and individual-scale contributions were identified using stepwise log–linear regression. The resulting models explained 68% of the variation for estimating western white pine basal diameter and 64% for estimating height. Interactions among spatial scales explained up to 13% of this variation and better described vegetation response than any single spatial scale. A hierarchical approach based on biophysical attributes is an excellent method for studying plant and environment interactions.

VULNERABILITY OF THE FIR CONEWORM, DIORYCTRIAABIETIVORELLA (GROTE) (LEPIDOPTERA: PYRALIDAE), IN DIFFERENT LARVAL STAGES TO THE HD-1 STRAIN OF BACILLUS THURINGIENSIS

1997 ◽  
Vol 129 (1) ◽  
pp. 197-198 ◽  
Author(s):  
Richard Trudel ◽  
Éric Bauce ◽  
Jean Cabana ◽  
Claude Guertin
Keyword(s):  
Bacillus Thuringiensis ◽  
Insect Pest ◽  
Specific Effect ◽  
Young Tree ◽  
Seed Orchards ◽  
Larval Stages ◽  
Dioryctria Abietivorella ◽  
Lepidoptera Pyralidae ◽  
Natural Stands ◽  
The Impact

The fir coneworm, Dioryctria abietivorella (Grote), is a major insect pest in seed orchards across Canada and the adjoining eastern and western United States. Larvae feed principally on cones, but they can also feed on needles and occasionally on the bark of young tree trunks (Hedlin et al. 1980; Ruth 1980; Martineau 1985). The potential for a population of D. abietivorella to build up in seed orchards may be greater than in natural stands (Hedlin et al. 1980; Ruth et al. 1982). The use of entomopathogen in the management of fir coneworm could be an adequate measure to reduce the impact of this insect. Moreover, Bacillus thuringiensis ssp. kurstaki has a specific effect on Lepidoptera (Aronson et al. 1986; Gill et al. 1992). The purpose of our study was to determine the activity of the HD-1 strain of B. thuringiensis ssp. kurstaki (serotype H-3a:3b) to larvae D. abietivorella. Bioassays were conducted with first-, third-, and fifth-instar larvae of fir coneworm to determine whether or not the insect's vulnerability to B. thuringiensis varies with larval age.

scholarly journals Susceptibility of Conifers to Three Dwarf Mistletoes in the Klamath-Siskiyou Mountains

2011 ◽  
Vol 26 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Robert Mathiasen
Keyword(s):  
Host Susceptibility ◽  
Mixed Conifer ◽  
White Pine ◽  
Dwarf Mistletoe ◽  
Susceptibility Data ◽  
Mixed Conifer Forests ◽  
Western White Pine ◽  
Siskiyou Mountains ◽  
Study Sites ◽  
Live Tree

Abstract Dwarf mistletoes (Arceuthobium spp., Viscaceae) are parasitic flowering plants that infect members of the Pinaceae family in the western United States. This article reports additional host susceptibility data for three dwarf mistletoes found in the Klamath-Siskiyou Mountains of southwestern Oregon and northwestern California. Three mixed conifer stands, each infested with either mountain hemlock dwarf mistletoe, western white pine dwarf mistletoe, or Wiens' dwarf mistletoe (nine stands total) were sampled to evaluate the susceptibility of conifers to these parasites. At each of the study sites, 10–20 temporary circular plots with a 6-m radius (0.012 ha) were established around large, severely infected trees. Within plots, species, dbh, and dwarf mistletoe rating (six-class system) were determined for each live tree. On the basis of the incidence of infection, conifers were assigned to host susceptibility classes. Western white pine and mountain hemlock were principal hosts of western white pine and mountain hemlock dwarf mistletoes, respectively. Brewer spruce and red fir were principal hosts of Wiens' dwarf mistletoe. Other conifers sampled were less susceptible to these mistletoes. This information can be used by forest managers to mitigate the damage associated with infestations of these dwarf mistletoes in mixed conifer forests of the Klamath-Siskiyou Mountains.

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