Table 2.

Ratios of newly mass-attacked green trees per ha to previously attacked red trees per ha (G:R ratio) in control, verbenone buffer, and residential areas in three subdivisions at Lac le Jeune, B.C.z

LocationG:R ratioy
Control areaVerbenone bufferResidential area
North Shore East11.53.6**0.5**
Townsite  6.52.6**0.3**
Little Lake  2.50.7**1.4 NS
Lookout  7.9—0.2**

  • ↵zRed trees averaged over entire area for each subdivision.

  • ↵yProbability of significant difference from control area (χ2 test) indicated by

  • ↵**P ≤ 0.05.

  • NS, not significant.