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Friday, July 10, 2020 | History

2 edition of Yellowheaded spruce sawfly found in the catalog.

Yellowheaded spruce sawfly

Steven A. Katovich

Yellowheaded spruce sawfly

its ecology and management

by Steven A. Katovich

  • 31 Want to read
  • 40 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station in St. Paul, Minn .
Written in English

  • Yellow-headed spruce sawfly -- Ecology.,
  • Yellow-headed spruce sawfly -- Control.

  • Edition Notes

    StatementSteven A. Katovich, Deborah G. McCullough, and Robert A. Haack.
    SeriesGeneral technical report NC -- 179.
    ContributionsMcCullough, Deborah G., Haack, Robert A., North Central Forest Experiment Station (Saint Paul, Minn.)
    The Physical Object
    Pagination24 p. :
    Number of Pages24
    ID Numbers
    Open LibraryOL17718026M

      Yellowheaded spruce sawfly and spruce budworm feed on new foliage on white, blue and black (Picea mariana) spruce trees. Black spruce is hardy in USDA zones 3 through 6. Sawfly damage is seen from about mid-May through July. If left untreated, it can severely defoliate and kill a tree in three to four years. Yellowheaded spruce sawfly Pikonema alaskensis. Needles are partially or completely consumed; New growth is eaten first, then old growth; Larva first appear from late May to mid June and feed until late June to late July; Has reddish brown head, light and dark green longitudinal stripes, grows up to 3/4 inch long.

    The yellowheaded spruce sawfly, Pikonema alaskensis (Roh.), is the most important pest of young black spruce plantations in eastern Canada (Martineau, ). First-instar larvae, which emerge in June, consume only small parts of the new needles (Katovich et al., ).Cited by: 7. Yellowheaded spruce sawfly (Pikonema alaskensis) has been reported feeding on spruces in shelterbelts in McHenry and Wells Counties this week. It is a primary pest of spruce in shelterbelts and ornamental plantings. Spruce shelterbelts need to be inspected for foliage-feeding sawfly larvae.

    Yellowheaded Spruce Sawfly. Consuming older needles in their youth and working their way to the new growth as they mature, yellowheaded spruce sawfly larvae will damage Colorado blue spruce . Yellowheaded spruce sawfly: Its ecology and management. Forest Service general technical report.

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Yellowheaded spruce sawfly by Steven A. Katovich Download PDF EPUB FB2

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Description: Up to 3/4 inch long. Yellow to reddish brown heads with olive-green body and six gray-green stripes. Where/When: Feed on the new needles of white, red, black, blue, Norway and Englemann spruce.

Present late May to early July. More information on Yellowheaded spruce sawfly. Yellowheaded spruce sawfly. Diet and feeding behaviour. Phyllophagous: Feeds on the leaves of plants. Free-living defoliator: Feeds on and moves about freely on foliage. Information on host(s) Its hosts include all native and exotic species of spruce: white, black, Engelmann, Colorado and Norway.

Trees are especially susceptible when growing. The yellowheaded spruce sawfly, Pikonema alaskensis, is a common defoliator of young open growing spruce trees predominantly in forest plantations, shelterbelts and ornamental plantings.

This insect can have an economic impact on forestry, the nursery industry and farm shelterbelts, as well as an aesthetic impact on ornamental trees. DISTRIBUTION. Yellowheaded spruce sawfly larvae Yellowheaded spruce sawfly book to feed on current-year foliage; older foliage may be eaten when new foliage is completely gone.

Life Cycle: Winter is spent in a prepupal stage in a cocoon in the litter. Pupation takes place in the spring, and adults emerge in early- to mid-June.

Eggs are laid singly in slits at the base of new needles. yellowheaded spruce sawfly. Although YHSS feeds on a variety of trees, host preference appears to vary geographically. In Minnesota, white spruce is the only commonly utilized host (Houseweart and Kulman b) even though black spruce is abundant and often grows in close association with white.

The yellow-headed spruce sawfly prefers young, open grown trees, resulting in extensive damage to spruce used in plantations and shelterbelts on the Prairies. Control. Infestations on a few small trees can be controlled by picking off and destroying the larvae when they are first noticed.

For shelterbelts or large trees, chemical control can be. Yellowheaded spruce sawfly (Pikonema alaskensis) larvae grow to approximately 18 mm long, with red-brown heads. The body is yellow-green with gray stripes. The adult is a stingless wasp.

The female has serrated teeth not unlike those of a wood saw. Adults are a straw yellow with varying degrees of black markings on the head, from a few spots to totally black. The yellow-headed spruce sawfly (YHSS) affects young spruce trees in Calgary. The sawfly infests and feeds on spruce trees that are growing singly or on the edge of a group of trees.

Infestations can begin when a tree is only three to five years old and if left untreated, can kill that tree within three years. The greenheaded spruce sawfly is common and is frequently found together with the yellowheaded sawfly but is considerably less damaging.

Mature larva to 20 mm long. Head, green marked with black stripes along the vertex and sides. Body, green with prominent white addorsal and spiracular stripes.

Yellowheaded spruce sawfly Pikonema alaskensis Order Hymenoptera, Family Tenthredinidae; common sawflies Native pest Host plants: White, black, and blue spruce Description: Adult sawflies are wasp-like, small, (8–10 mm) and reddish brown.

Mature larvae are approxi-mately 18 mm long and have a yellow to reddish-brown head with an olive green Size: 30KB. Yellowheaded Sawfly. Adult yellowheaded sawflies are stingless wasps, measuring at about 1/3 inches long. They are a defoliator of spruce trees throughout our region. Detection & Treatment.

The yellowheaded sawfly will, in time, strip spruce trees of their needles. Early detection includes the top needles of the tree turning a reddish-brown color. Yellowheaded spruce sawfly larvae do not produce webbing like budworms.

Often only the top half of needle consumed. Feeding occurs on both new and older foliage. Severe feeding leaves trees with a ragged appearance.

Young open grown spruce trees are most susceptible. Severely attacked trees are often under 25 years and less than 4 metres in height. Yellowheaded spruce sawfly is a serious pest in our area and is found in most types of spruce. Early July is when the olive green larvae first appear and can be found on the branches of spruce.

Generally speaking the larvae are similar to budworm in. Yellowheaded spruce sawfly prepupa inside an opened cocoon. Damage: Larvae prefer new needles, but will eat last year’s needles when new foliage is scarce.

Defoliation for three or four years in a row can kill a tree. Management: Look for yellowheaded spruce sawflies in spring. Use a pesticide if it is necessary to treat larvae. The yellowheaded spruce sawfly (Pikonema alaskensis) is native to North America.

Mature larvae are about 20 mm (three quarters of an inch) long. They look like hairless green caterpillars with a series of darker stripes running along the body. They have a. If you have had defoliation in previous years from Yellowheaded Spruce sawfly you should monitor your spruce to determine if spraying will be necessary this year.

Repeated severe defoliation can cause tree mortality. More info can be found in this Forest Service publication. Written by: Linda Williams, forest health specialist, Woodruff, (Linda.

Yellow-headed spruce sawfly. The yellow-headed spruce sawfly (Pikonema alaskensis Rohwer) is widely known in the northern United States and Canada as a destructive pest of spruce (Shenefelt and Benjamin ).It attacks white, black, Norway, and Colorado blue larvae at first prefer new foliage, but after becoming about half-grown, old.

Yellowheaded spruce sawfly. Jill O’Donnell, Michigan State University Extension - J Editor The sawfly Pikonema alaskensis Rohiver feeds on all spruces found in Michigan. The larvae are light green with a brown or reddish-yellow head and a green stripe on each side of the body.

Yellowheaded sawfly on spruce. A) Damage and needle defoliation on a white spruce tree. B) Yellowheaded spruce sawfly larvae feed indiscriminately on needles throughout the tree; when younger they blend well with the tree’s needles; the brown head capsule is a distinguishing feature.

C). Get this from a library! Yellowheaded spruce sawfly: its ecology and management. [Steven A Katovich; Deborah G McCullough; Robert A Haack; North Central Forest Experiment Station (Saint Paul, Minn.)] -- Presents the biology and ecology of the yellowheaded spruce sawfly, and provides survey techniques and management strategies.

In addition, it provides information on. The yellowheaded spruce sawfly,Pikonema alaskensis (Rohwer), was known to possess a potent secondary pheromone with the polarity of an alcohol, based on earlier studies with Florisil fractions.

Purification of the 25% ether-hexane Florisil fraction (polarity as with alcohols) and the hydrolyzed 5% ether-hexane fraction (polarity as with esters) f Cited by: Yellow Headed Spruce Sawfly- (Pikonema alaskensis Rohwer), can cause serious economic and aesthetic loss to ornamental and commercially grown spruce.

The feeding destruction of the needles can reduce plant growth and vigor up to two years after the damage occurs. The yellowheaded spruce sawfly “worm” is commonly misidentified as the spruce Location: ave NW, Edmonton, T6P 1M2, Alberta.