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Research ArticleArticle

Control of the Spring Generation of Nantucket Pine Tip Moth with Insecticides

James E. Appleby
Arboriculture & Urban Forestry (AUF) May 1975, 1 (5) 91-92; DOI: https://doi.org/10.48044/jauf.1975.021
James E. Appleby
Illinois Natural History Survey and Illinois Agricultural Experiment Station, Urbana-Champaign, Illinois
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Excellent control of first generation Nantucket pine tip moth larvae resulted with foliar sprays of acephate, dimethoate, oxydemetonmethyl, and Supracide when applied in early May, 1973 to loblolly and shortleaf pines in southern Illinois.

The Nantucket pine tip moth, Rhyacionia frustrana (Comstock), is found from Massachusetts to Florida, west to Texas, Missouri, and Illinois (Yates and Beal 1971). The moth seriously injures shortleaf pine, Pinus echinata Mill.; loblolly pine, P. taeda L.; and Scotch pine, P. sylvestris L.; in southern Illinois by killing buds and branches. The growth rate of the trees protected with chemicals is much greater than those not treated (Barras et al. 1967, Beal 1967, Grano and Grigsby 1968, Warren 1965, 1968).

Chemical control has been accomplished by spraying pines with systemic insecticides such as dimethoate (Barras et al. 1967, Rauschenberger et al. 1969, Yates and Beal 1971), Bidrin (Barras et al. 1967), phorate (Barras et al. 1967, Beal 1967, Rauschenberger et al. 1969, Scheer and Johnson 1970), and disulfoton (Barras et al. 1967, Warren 1968).

Because existing control measures were not effective, nurserymen and forest managers in southern Illinois were experiencing damage to pine trees caused by R. frustrana. A test was initiated in the spring of 1973 to determine the effectiveness of some newer insecticides in controlling the spring generation of the moth. The insect overwinters as a pupa inside the damaged branch. In southern Illinois the adult moths emerge during warm days in early April and deposit eggs on the needles or twigs. The eggs hatch in 7 to 10 days and the larvae burrow into the base of the needles and later into the shoots. The larval feeding eventually results in the death of the shoot.

METHODS AND MATERIALS.—Insecticide sprays were applied on May 3, 1973, near Simpson, III., in an acre planting of loblolly and shortleaf pine ca. 4-6 ft in height. The moth larvae, which developed from eggs deposited in April, were ca. 6.0 mm long and were found feeding at the base of the new pine needles or just under the bark of the new branches. Other than a minute amount of frass at the feeding sites, no noticeable damage was apparent.

Three loblolly and 2 shortleaf pine trees were selected for each treatment. Each of the trees in each plot showed considerable moth damage from the 1972 infestations. In each group of 5 trees, the total number of damaged branches from the 1972 infestation was counted just prior to treatment to insure that the treated trees were highly susceptible to moth damage. Using a 3 gal knapsack sprayer, acephate 75SP, dimethoate 2E, oxydementonmethyl 2E, and Supracide (0, 0-dimethyl phosphorodithioate, S-ester with 4-(mercapto-methyl)-2-methoxy-1,3,4-thiadiazolin-5-one) 2E were applied as foliar sprays until runoff. Each treatment (Table 1) was applied to 5 trees. On June 11, 1973, the number of infested pine branches was counted in each of the treatments.

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Table 1.

Effectiveness of insecticides applied on May 3, 1973 to loblolly and shortleaf pine trees near Simpson, III., for control of the Nantucket pine tip moth.

RESULTS AND DISCUSSION.-All insecticide treatments resulted in excellent control (Table 1). No phytotoxicity was noted in any of the treatments. The untreated trees had an increase in the total number of infested shoots in comparison to the previous year. On June 11 infested shoots were easily recognized from the normal condition by the browning and curling of the growth.

Timing the application of insecticides to kill adult or exposed larval stages is particularly difficult during the spring months. Variable weather conditions alter adult emergence and egg hatch from year to year and in a given season. Systemic insecticides tend to translocate to new growth where the larvae feed for nearly a month. Control of larvae already inside branches thus requires less precise timing. Therefore, this type of control is particularly applicable to the spring months due to its variable weather.

Footnotes

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  • ↵1. Lepidoptera: Olethreutidae.

  • ↵2. In cooperation with the Dixon Springs Agricultural Center, Simpson, III., 62985.

  • ↵3. Associate Entomologist, Illinois Natural History Survey, and Associate Professor, Illinois Agricultural Experiment Station.

  • © 1975, International Society of Arboriculture. All rights reserved.

Literature Cited

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  1. ↵
    1. Barras, S. J.,
    2. D. F. Clower, and
    3. R. G. Merrifield
    . 1967. Control of the Nantucket pine tip moth on loblolly pine with systemic insecticides in Louisiana. J. Econ. Entomol. 60: 185–90.
    OpenUrl
    1. Beal, R. H.
    1967. Heavy tip moth attacks reduce early growth of loblolly and shortleaf pine. USDA Forest Serv. Res. Note SO-54. 3 p.
  2. ↵
    1. Grano, C. X. and
    2. H. C. Grigsby
    . 1968. Spraying southern pines not practical for tip-moth control. USDA Forest Serv. Res. Note SO-77. 2 p.
  3. ↵
    1. Rauschenberger, J. L.,
    2. T. H. Flavell,
    3. W. H. Clerke, and
    4. C. R. Grady
    . 1969. Pilot test of systemics for control of the Nantucket pine tip moth. USDA Forest Serv. Southeastern Area Sta. and Private For. 11. 13 p.
  4. ↵
    1. Scheer, C. F. and
    2. G. V. Johnson
    . 1970. Systemic insecticides against the spirea aphid, birch leaf miner, and Nantucket pine tip moth. J. Econ. Entomol. 63: 1205–7.
    OpenUrl
  5. ↵
    1. Warren, L. O.
    1965. Controlling insect damage to young southern pine stands. 14th Annual Forestry Symposium, Insects in Southern Forests. Louisiana State Univ. Press, Baton Rouge, La. 129 p.
  6. ↵
    1. Warren, L. O.
    1968. Controlling Nantucket pine tip moth on shortleaf and loblolly pines. Arkansas Farm Res. 17: 6.
  7. ↵
    1. Yates, H. O. and
    2. R. H. Beal
    . 1971. Nantucket pine tip moth. USDA Forest Serv. Pest Leaflet 70. 6 p.
    OpenUrl
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Vol. 1, Issue 5
May 1975
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Control of the Spring Generation of Nantucket Pine Tip Moth with Insecticides
James E. Appleby
Arboriculture & Urban Forestry (AUF) May 1975, 1 (5) 91-92; DOI: 10.48044/jauf.1975.021

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Control of the Spring Generation of Nantucket Pine Tip Moth with Insecticides
James E. Appleby
Arboriculture & Urban Forestry (AUF) May 1975, 1 (5) 91-92; DOI: 10.48044/jauf.1975.021
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