Article Figures & Data
Figures
- Figure 1.
Comparison of SPB infestation size and location during the April-June periods of (a) 1994 and (b) 1995. The rapid detection and destruction of SPB brood clearly reduced the number and severity of infestation in the urban area, but failed to keep infestations from developing over a larger area.
- Figure 2.
Location and relative size (number of infested trees) of active southern pine beetle (SPB) infestations in Alachua County, FL. (a) Approximate location of 4 active spots in January 1994,3 months before discovery of outbreak, (b) Location of more than 600 properties affected during SPB outbreak.
Tables
- Table 1.
Effectiveness of two insecticides for remedial treatment of SPB-infested pines. (Beetles/ft2, mean ± standard error.) Each mean is the average of eight 20-cm-long pine bolts treated during mid-to late stages of brood development.
Response Pesticide treatment Control Chlorpyrifos 1% Lindane 0.5% Beetles emerging % of control 124.1 ± 18.8 45.3 ± 19.4 36.5% 31.6 ± 10.6 25.5% Beetles flying % of control 104.7±18.8 1.6 ±0.8 1.5% 1.1 ±0.7 1.1% - Table 2.
4-AA treatment results, Gainesville, FL, 6/28/95 to 6/10/95. No. sites treated: 7 (5 homesites, 2 forested); no. trees treated with 4-AA: 93 (73 homesites, 20 forested). Total percentage of 4-AA-treated trees attacked: 8.5%; no. verbenone-treated trees attacked by SPB: 15/22, 68%, no. untreated trees attacked by SPB: 9/13, 69%.
No. treated No. attacked Adjacent untreated attacked 4-AA treated homesites homesite 1 9 0 11 homesite 2 19 1 39 homesite 3 14 2 16 homesite 4 16 0 8 homesite 5 15 3 9 % attacked 8.2 ± 3% 4-AA treated forested sites forested 1 10 0 3 forested 2 10 2 0 % attacked 10 ±2% Vervenone-treated forested sites forested 1 10 10 3 forested 2 12 5 0 % attacked 68 + 10% Untreated (control) forested sites forested 1 5 5 0 forested 2 8 4 2 % attacked 69 + 13% * Eight were treated with 50% recommended dose of Dursban 2E.
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