Article Figures & Data
Tables
- Table 1. The relative abundance and frequency of problems for 10 of the most common woody ornamental plants found at 90 homesites in Owatonna, Minnesota.
Plant species % of total plants % of total problems % of plants with problems Thuja occidentalis 20.4 4.1 7.6 Juniperus spp. 8.3 1.5 6.7 Picea glauca 5.9 1.1 7.1 Lonicera tatarica 5.6 14.2 95.0 Spiraea x vanhouttei 5.5 3.8 2.6 Lonicera xylosteum 4.3 0.0 0.0 Fraxinus pennsylvanica 3.7 8.6 88.5 Potentilla fruticosa 3.5 0.0 0.0 Syringa vulgaris 3.2 6.7 78.3 Picea pungens 3.2 3.4 39.1 - Table 2. The relative abundance and frequency of problems for 10 woody ornamental plants most often affected by serious pest problems. Data from 90 homesites in Owatonna, Minnesota.
Plant species % of plants with problems % of total problems % of total plants Picea pungens 39 3.4 3.2 Cotoneaster lucidus 71 3.8 2.0 Elaeagnus angustifolia 71 0.8 0.3 Gleditsia triacanthus var inermis 75 1.1 0.6 Malus spp. 78 5.2 2.5 Ribes alpinum 83 7.5 2.8 Crataegus spp. 89 2.3 0.9 Lonicera tatarica 95 14.2 5.6 Ulmus americana 100 1.1 0.4 Betula pendula 100 0.8 0.3 - Table 3. Comparison of monitoring time between homesites having fewer than 8 key plants and those having more utilizing the Wilcoxon signed rank test procedure. Homesites were 0.25 acre lots in Owatonna, Minnesota.
Total number of woody plants n Avg. monitoring in minutes Less than 8 key plants 8 or more key plants 11-20 10 9 15 21-30 14 10 16 31-40 10 12 19 40 + 8 16 24 Differences between paired data were significant at the 0.01 level.