Incidence of fusiform rust infection on loblolly pine related to tip moth damage

Conference · Sun Sep 01 04:00:00 EDT 1985

OSTI ID:6940660

Powers, Jr, H R; Stone, D M

Nantucket pine tip moth (Rhyacionia frustrana) is a common pest over most of the natural range of loblolly pine, causing deformation and growth reduction of seedlings and saplings during the early life of the stand. Fusiform rust (caused by Cronartium quercuum f. sp. fusiforme) is a limiting factor in the production of southern pines throughout a broad area of the southeastern United States, extending from South Carolina to Texas. The target areas on the hosts for both pests are young, succulent shoot tissues. Carbofuran, a systematic insecticide, was used to determine the effect of controlling tip moth on seedlings infected by the fusiform rust organism. Beginning with the 2nd year carbofuran was applied over 4 successive years. The insecticide sharply reduced the incidence of tip moth and increased the height of 5-year-old saplings compared with untreated controls. Usually any treatment that stimulates the growth of pines also results in increased rust infection. However, this was not the case here because untreated saplings had significantly more infection. It is not known whether the increased disease incidence on untreated trees was due to the susceptibility and/or total number of secondary shoots initiated in response to tip dieback caused by the tip moth, or if carbofuran itself has some fungicidal effect resulting in lower infection on treated seedlings. 6 refs., 1 tab.

• Research Organization: Forest Service, Athens, GA (USA). Southeastern Forest Experiment Station; Forest Service, Grand Rapids, MI (USA). North Central Forest Experiment Station
• DOE Contract Number: AI09-86SR15122
• OSTI ID: 6940660
• Report Number(s): CONF-8509370-1; ON: DE87003912
• Country of Publication: United States
• Language: English

Related Subjects

510100 -- Environment
Terrestrial-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
550900 -- Pathology
560300* -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
ARTHROPODS
CONIFERS
DISEASE RESISTANCE
DISEASES
FIELD TESTS
FUNGAL DISEASES
GROWTH
INFECTIOUS DISEASES
INSECTICIDES
INSECTS
INVERTEBRATES
LEPIDOPTERA
MOTHS
PESTICIDES
PINES
PLANT DISEASES
PLANT GROWTH
PLANTS
SEEDLINGS
TESTING
TREES