Dioryctria resinosella

Mutuura, 1982

red pine shoot moth

Dioryctria resinosella is a conifer-feeding in the , described in 1982. The are specialized shoot borers of red pine (Pinus resinosa), attacking new shoots and cones. This exhibits localized patterns within plantations and has a with discrete seasonal activity. It is known from Ontario and the northern United States, with detailed bionomics studied in Wisconsin sand plain plantations.

Dioryctria resinosella pupa by Steven Katovich. Used under a CC BY 3.0 us license.Dioryctria resinosella damage by Steven Katovich. Used under a CC BY 3.0 us license.Dioryctria resinosella pitch tube by Steven Katovich. Used under a CC BY 3.0 us license.

Pronunciation

How to pronounce Dioryctria resinosella: /ˌdaɪ.ɔːˈrɪk.tri.ə ˌrɛ.zɪˈnoʊ.sɛl.lə/

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Habitat

Red pine (Pinus resinosa) plantations, particularly in sandy soils. In mixed pine stands, attacks are restricted to P. resinosa. rates are highest at plantation edges, in the upper half of the crown, and in stands greater than 20 years of age.

Distribution

Ontario, Canada and the northern United States. Documented in Wisconsin sand plain plantations; specific distribution within the northern U.S. not fully detailed in available sources.

Seasonality

period extends from mid-July to mid-September. Shoot feeding is initiated by third- in late May. First-instar larvae overwinter in . occurs in July.

Diet

feed on new shoots and cones of red pine (Pinus resinosa).

Host Associations

  • Pinus resinosa - primary feed on shoots and cones; exclusive in mixed pine stands
  • Hyssopus rhyacioniae - most frequently reared from and

Life Cycle

Five larval based on -capsule measurements. First-instar overwinter in . Third-instar larvae initiate shoot feeding in late May. occurs in July. emerge with period from mid-July to mid-September. Sex ratio is 0.53 (female-biased).

Behavior

bore into new shoots and cones. Shoot attack begins in late May. is localized: highest rates occur at plantation edges, in the upper crown half, and in older plantations. In mixed stands, larvae exclusively select P. resinosa despite presence of other pine .

Ecological Role

and pest of red pine plantations. Subject to natural by , particularly Hyssopus rhyacioniae.

Human Relevance

Economic pest of red pine in plantation forestry. Damage patterns suggest management implications for plantation design and age structure. Potential for using associated .

Similar Taxa

  • Dioryctria auranticellaalso a coneworm in the same ; D. resinosella distinguished by on Pinus resinosa and shoot-boring in addition to cone feeding
  • Dioryctria abietellacongeneric coneworm ; D. resinosella differs in association (P. resinosa vs. various conifers) and geographic range
  • Dioryctria pryericongeneric pest of pines; D. resinosella distinguished by description date (1982), , and northern distribution

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Sources and further reading