Article Figures & Data
Tables
Classification 1980 1986 # of cities reporting Mean tree care budget $1000 % of total city budget # of cities reporting Mean tree care budget $1000 % of total city budget change of mean tree care budget % Total all cities 946 131 0.81 749 163 0.49 + 25 Population group over 1,000,000 5 3,128 0.25 2 5,500 0.09 + 76 500,000 10 1,050 0.33 8 905 0.02 -14 250,000 24 829 0.42 15 1,088 0.06 + 31 100,000 65 300 1.01 50 504 0.06 + 68 50,000 132 182 0.94 111 203 0.28 + 12 25,000 225 90 1.02 200 124 0.62 +39 10,000 428 32 0.69 320 44 0.70 +37 5,000 27 12 0.43 22 40 0.12 + 237 less than 5,000 30 7 0.57 21 5 1.91 + 33 - Table 2
The ten most important insect pests in 1986 by region, with rank comparison to 1980.
Northeast Weighted Valuea 1 (1b Gypsy moth 487 2 (-) Ants 112 3 (8) Japanese beetle 89 4 (3) Aphids 83 5(2) Tent Caterpillar 82 6(7) Scales 56 7 (4) Webworm 35 8 (-) Mosquitos 31 9 (5) Elm bark beetle 30 10 (10) Bagworm 25 Total weighted value, top ten Weighted value of all insects 1030 in region 1271 Percent of all insects 19.5% Percent of all pests 14.6% NorthCentral 1 (2) Aphids 174 2 (-) Cottony maple scale® 160 3 (4) Borers 123 4 (7) Bagworm 121 5 (9) Tent Caterpillar 120 6 (3) Elm bark beetle 115 7(6) Elm leaf beetle 105 8 (-) Web worm 70 9 (-) Birch borers 60 10(1)Scalesb 58 Total weighted value, top ten Weighted value of all insects 1106 in region 1641 Percent of all insects 25.2% Percent of all pests 18.8% South 1 (2) Borers 197 2 (1) Bagworm 170 3 (4) Aphids 151 4 (5) Web worm 145 5 (3) Scales 132 6 (7) Elm leaf beetle 94 7 (6) Tent caterpillar 79 8 (9) Pine bark beetle 66 9 (-) Mosquitos 62 10 (8) Japanese beetle 29 Total weighted value, top ten Weighted value of all insects 1125 in region 1620 Percent of all insects 24.9% Percent of all pests 18.6% West 1 (1)Aphids 539 2 (3) Elm leaf beetle 233 3 (8) Borers 120 4 (5) Thrips 112 5 (2) Scales 89 6 (6) Tent caterpillar 70 7 (10) Mites’1 57 8 (4) Caterpillar 49 9 (-) Spider mited 49 10 (-) Oak moth 48 Total weighted value, top ten Weighted value of all insects 1366 in region 1970 Percent of all insects 30.3% Percent of all pests 22.7% National 1 (1) Aphids 947 2 (3) Gypsy moth 546 3 (5) Elm leaf beetle 445 4 (6) Borers 451 5 (4) Tent Caterpillar 351 6 (2) Scales 335 7 (7) Bag worm 322 8 (9) Webworm 265 9 (-) Ants 218 10 (8) Elm bark beetle 196 Total weighted value, top ten Weighted value of all insects 4076 nationally 6502 Percent of all pests 74.8% Northeast Weighted Valuea 1 (1)bDED 135 2 (4) Maple decline 45 3 (3) Anthracnose 21 4 (-) Ash dieback 18 5 (-) Oak wilt 16 Total of above Weighted value of all diseases 235 in region 286 Percent of all diseases 13.1% Percent of all pests 3.3% North Central 1 (1)DED 416 2 (3) Anthracnose 134 3 (2) Oak wilt 98 4 (4) Maple decline 90 5 (5) Verticillium 82 Total of above Weighted value of all diseases 820 in region 1031 Percent of all diseases 47.2% Percent of all pests 11.9% South 1 (1) DED 102 2 (-) Lethal yellowing 30 3 (-) Powdery Mildew 22 4 (-) Ganoderma 21 5 (-) Oak decline 20 Total of above Weighted value of all diseases 195 in region 330 Percent of all diseases 15.1% Percent of all pests 3.8% West 1 (1) Anthracnose 137 2 (2) DED 120 3 (-) Drought 42 4 (-) Verticillium 41 5 (3) Fire blight 37 Total of above Weighted value of all diseases 377 in region 539 Percent of all diseases 24.7% Percent of all pests 6.2% National 1 (1) DED 773 2 (2) Anthracnose 299 3 (3) Verticillium 140 4 (6) Maple decline 135 5 (4) Oak wilt 133 Total of above Weighted value of all diseases 1480 nationally 2186 Percent of all pests 25.2% Classification 1980 Number reporting Response % yes 1986 Number reporting Response % yes Total all cities 1114 22 804 22 Population group Over 1,000,000 5 60 2 50 500,000 11 45 9 33 250,000 26 31 18 22 100,000 67 34 56 34 50,000 143 31 117 29 25,000 257 24 210 24 10,000 527 17 353 18 5,000 33 9 18 33 less than 5,000 45 13 21 - Geographic Region Northeast Northeast 266 17 161 14 North Central 354 14 263 16 South 237 26 187 25 West 257 35 193 35 Classification 1980 Number reporting Response % yes 1986 Number reporting Response % yes Total all cities 1012 25 747 25 Population group Over 1,000,000 5 40 2 50 500,000 12 25 8 50 250,000 25 36 17 29 100,000 60 37 56 30 50,000 131 32 112 29 25,000 228 28 196 29 10,000 179 21 310 20 5,000 36 19 23 17 less than 5,000 13 19 23 23 Geographic Region Northeast 229 16 150 16 North Central 338 24 241 29 South 208 24 168 22 West 237 36 188 29 Rank Pesticides Weighted value 1. (1)a Sevin® (Carbaryl) 834 2. (2) Malathion 824 3. (3) Diazinon 549 4. (5) Orthene® 311 5. (7) Dormant Oil 205 6. (8) Lindane 167 7. (*) Dursban® 157 8. (6) Bt (Bacillus thuringiensis) 142 9. (9) Kelthane® 139 10. (4) Methoxychlor 121 3449 Weighted value of all insecticides 4375 Fungicides 1. Benomyl/Benlate® 68 2. Bordeaux 28 3. Zineb 19 4. Captan 15 130 Weighted value of all fungicides 217 Spraying schedules 1980a 1986b # Cities % # Cities % Regular intervals 74 6 45 5 Calendar dates 92 8 60 7 Apparent need 711 62 548 66 Not at all 347 30 234 28 ↵a 1,137 responded to question
* 830 responded to question
In this issue
Jump to section
Related Articles
Cited By...
- No citing articles found.