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Find here a listing of approximate dates for applications and the pests to be addressed. Also note (when the data is available) the PPIs (Phenology) & the GDDs (Growing Degree Days) which correspond to the most efficient window of opportunity for effective control. Since insects, fungi, etc. don't read calendars, rather develop as our growing season & its accumulated temperatures progress, these figures provide a much more accurate method of scheduling effective applications. Phenology (PPI) refers to a plant that will be in peak bloom at the most optimum window of opportunity. Growing Degree Days (GDD) refers to a method of measuring accumulated temperatures during the growing season. I plan to post weekly updates of the GDD for the Rochester area on this page from March 15th to the conclusion on the growing season. |
| Summary for week ending: | 09/11/07 |
| GDD reading for Rochester, NY: | 2490 |
E. :(Early; 1-10)
M. :(Mid; 11-20)
L. :(Late; 21-31)
| Dates: | Item: | PPI (Phenology): | GDD: |
| L.Mar-M.May | Horticultural oil | 7-248 | |
| M.Mar-L.Apr | Fire blight, copper spray | ||
| M.Apr-E.May | Fungus control #1 | ||
| M.Apr | Black turpentine beetle, (early) | ||
| M.-L.Apr | Spruce gall adelgid | Japanese Quince | 22-81 |
| L.Apr-E.May | Hemlock woolly adelgid, (early) | Japanese Quince | |
| L.Apr-M.May | Fire blight, (early blossom spray) | ||
| L.Apr-M.May | Honey locust plant bug | Box Elder | 58-246 |
| L.Apr-M.May | Fungus control #2 | ||
| L.Apr-M.May | Turf weeds, (very early) | ||
| L.Apr-M.May | Growth regulator, (early) | ||
| E.-L.May | Fire blight, (blossom spray) | ||
| E.-L.May | Growth regulator, (mid) | ||
| E.-L.May | Fungus control #3 | ||
| M.-L.May | Growth regulator, (late) | ||
| M.May | Systemic insect controls | ||
| M.May | Viburnum leaf beetle, (larva) | Redbud | 80-120 |
| M.May | Phytophthora root rot, (early) | ||
| M.May | Landscape weed control, (early) | ||
| M.May-M.Jun | Black vine weevil, (adults) | 148-400 | |
| M.-L.May | Birch leaf miner, (early) | Flowering Dogwood | 190-290 |
| M.-L.May | Spruce spider mite, (early) | Redbud | 192-363 |
| M.-L.May | Boxwood mite | 245-600 | |
| M.-L.May | Black turpentine beetle, (late) | ||
| M.-L.May | Boxwood psyllid | Laburnum alpinum | 290-440 |
| M.May-E.Jun | Boxwood leaf miner, (early) | Kousa Dogwood | 350-600 |
| E.-M.Jun | Bronze birch borer, (early) | Kousa Dogwood | 440-700 |
| E.-M.Jun | Pieris lace bug, (early) | Kousa Dogwood | 448-618 |
| M.-L.Jun | Birch leaf miner, (late) | 530-700 | |
| M.Jun-E.Jul | Euonymus scale,(crawlers; early) | Kousa Dogwood | 533-820 |
| M.Jun-M.Jul | Pieris lace bug, (late) | Spiraea bumalda | 618+ |
| L.Jun-E.Jul | Bronze birch borer, (late) | Kousa Dogwood | 700-880 |
| L.Jun-E.Jul | Juniper scale, (crawlers) | Mock Orange | 707-1260 |
| E.Jul | Viburnum leaf beetle, (adults; early) | ||
| M.Jul | Japanese beetles, (early) | 1029-1500 | |
| M.Jul | Hemlock woolly adelgid, (late) | Goldenrain Tree | |
| M.-L.Jul | Euonymus scale, (crawlers, late) | Abelia | 1150-1388 |
| M.Jul | Boxwood leaf miner, (late | Littleleaf Linden | 1200-2400 |
| M.-L.Aug | Japanese beetles, (late) | 1500-2154 | |
| M.-L.Aug | Viburnum leaf beetle, (adults; late) | ||
| M.-L.Aug | Landscape weed control, (late) | ||
| L.Aug-M.Sep | Spruce spider mite, (late) | Witch hazel | 2375-2806 |
| E.Sep | Phytophthora root rot, (late) | ||
| M.Sep | Magnolia scale, (crawlers; early) | ||
| E.Oct | Magnolia scale, (crawlers; late ) |
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www.lovearboreal.com Last updated: Spring. 2004 Please direct all comments to: FZR4001989@aol.com |