Disease Index 2018 - 2025 - Landscape and Nursery IPM Alert
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| DISEASES | DATE OF REPORT |
|---|---|
| Anthracnose | 25May30 (maple), 25May23 (sycamore, oak, beech, and maple) 24Apr12 (landscape plants) 19May24 (on strawberry) |
| Anthracnose, ash | 23May12, 19May17 |
| Anthracnose, spot - Elsinoe (on dogwood) | 25Apr11 24Apr26 22May06 18May04 20May08 |
| Anthracnose, sycamore | 25Jun13 24May24 23May19, 23May12 21May14 20Jun26, 20Jun19, 20May08 |
| Apple (disease tolerant) | 24Jan17 |
| Aster yellows | 24Jun21 23Jul28 20Jul31 19Aug02 |
| Bacterial leaf scorch | 23Jul28 20Jul31 (oak) 19Aug16 (oak) |
| Bacterial wilt | 18Jun29 (cucurbits) |
| Beech leaf disease | 25Jul11, 25Jun06, 25May23, 25May09 24Jun14, 24May10 23Oct27, 23Sep08 (MDA confirms it in MD), 23Jul14, 23May12 21Aug27 (in Virginia) 19Aug23 18Aug03 |
| Black knot (on Prunus) | 23Oct27, 23Jan24 22Jun03 21Aug27 17Jun02, 17Mar17 |
| Black spot on roses | 25May09 20Apr24 19May24 |
| Bacterial blight | 21Jul16 (on geraniums) |
| Bitter rot on apples | 22Jun17 |
| Blight, boxwood | 24Aug23 22Apr15 21Aug27 (breeding program) 20Oct09, 20Aug28, 20Apr24 19Apr26 (Risk Model) 18Oct19, 18Oct12, 18Aug24 |
| Blight, brown rot blossom (on Kwanzan cherries) | 20May08 |
| Blight, clematis | 20Jun19 |
| Blight, eastern filbert | 19Aug09, 19Apr05 18Apr13 |
| Blight, late | 18Jun08 |
| Blight, lilac bacterial | 20May01 |
| Blight, Pestalotiopsis tip | 20Sep18 |
| Blight, Phoma (on vinca) | 19Jun07 |
| Blight, southern | 25Jul18 24Aug09 23Aug11, 23Jun16 19Jul26 18Aug17 (hosta) |
| Blight, tip | 24Apr12 (on juniper) |
| Blight, web (on holly) | 22Aug05 |
| Blister, oakleaf | 20May29 |
| Blossom blast | 25Apr11 |
| Botryosphaeria | 22Sep30 (dogwoods) 20Apr24 (redbud) |
| Botrytis | 25May30, 25Apr25 (tulip fire) 20Jul24 18Jun29 (lily) |
| Brown patch in turf | 25Jul11, 25Jun20 24Aug16, 24May24 23Jul21, 23Jun23 21Jul09 20Jul17 (and nitrogen), 20Jul02 19Jun07 18Sep14, 18Jul13, 18Jun08 |
| Brown rot on cherry | 24Apr12 23Jun09 22May27 18May25, 18May18 |
| Cankers | 25Apr04 (arborvitae) 22May13 (Seiridium and Botryosphaeria on Leyland cypress) |
| Canker, Cytospora | 25Jun06 |
| Cherry shot hole diseases | 25Apr04 20Nov13, 20May22, 20Apr03 18Jul06 |
| Disease activity in early spring | |
| Dollar spot in turf | 25Aug15, 25Jun20 20Jul24 18Sep14 |
| Downy mildew, basil | 22Aug26 21Oct15, 21Sep10 20Aug21 19Apr12 |
| Downy mildew, impatiens | 19Jul12 |
| Downy mildew, Rudbeckia | 20Jul02 |
| Fairy rings in turf | |
| Fire blight | 25May23 24May03, 24Apr19 23May26, 23May19, 23May12, 23Apr28 22Apr22 21May10 20Apr17 19Aug23, 19May10 18Jun08, 18May18, 18May04 |
| Fly speck and sooty blotch on apple | 18Sep14 |
| Fruit trees | 24Jun14, 24May03 (PA disease report) 23Jul28, 23Apr28, 23Apr07 (update), 23Mar31 (disease control) 22Sep09 (late season diseases), 22Mar25 21Aug27 (late season apple diseases), 21May21, 21Apr30, 21Apr23, 21April12 19Oct18 |
| Fungus, Septobasium and scale insects | 20Aug07 |
| Fungi | 24Aug09 (bird's nest fungi) 20Oct16 |
| Fungicide, systemic | 24Jul19 |
| Fungus, artillery | 22Jul15 18May18 |
| Fungus, blue velvet spread | 20Sep25 |
| Fungus, carbon crust | 20Jun12 |
| Fungus, dog vomit | 23Apr07 22Oct28, 22Jun10 |
| Fungus, on oak (smooth patch, white patch, or bark patch) | 20Aug14 |
| Fungus, puffball | 24Oct11 20Oct02 |
| Fungus, stinkhorn | 20Sep04 19Aug23 18Jun01 |
| Fungus, white spindles (in turf after rain) | 20Aug21 |
| Gall, crown | 25Jul25 24Oct25 22Oct21 |
| Gall, exobasidium | 24May17 23Jun30, 23May19, 23May12 (on azalea and camellia) 22May20 21Jun04 20Jun19, 20May29 19May17 |
| Gall, oak button | 23Jun09 |
| Gunignardia aesculi leaf spot on horsechestnut | 23Jun23 22Sep09 |
| Laurel wilt | 25Sep19 (found in Long Island) |
| Leaf blotch | 18Aug03 (on horsechestnut) |
| Leaf curl, peach | 25Oct24 24Oct18, 24May10, 24May03, 24Apr19, 24Feb29 23Apr28, 23Apr07, 23Mar24 22May27, 22May06 19May03 |
| Leaf spots | 24Oct11 (late season) 22Oct14 (late season) |
| Leaf spot, cercospora | 20Jul10 (roses) 18May25 |
| Leaf spot, on cherry | 19Sep13 18Jul06 |
| Leaf spot, on cherry laurel | 19Apr26 |
| Leaf spot, on clematis | 18Jun29 |
| Leaf spot, gray | 18Oct19, 18Oct05 |
| Leaf spot, on holly | 19May03 |
| Leaf spot, Hydrangea | 20May29 |
| Leaf spot, on mountain laurel and rhododendron | 21Apr23 |
| Leaf spot (on photinia) | 22May27 |
| Leaf spot, Septoria | 20Jul02 (Rudbeckia) |
| Leaf spot, Tubakia | 20Aug21 19Aug16 |
| Leaf spot, yucca | 18Apr06 |
| Leaf streak, daylily | 21May07 |
| Marsonnia blotch on apples | 19Aug23 18Oct26 |
| Mushrooms Mushrooms, glowing | 23Sep29 20Oct09, 20Oct02 (Jack O'Lantern), 20Sep04 |
| Mushrooms and Conks | 23Sep22 (on living trees) |
| Mushrooms in turf | 24Aug16 |
| Needle blight, Phyllosticta | 25Apr04 (arborvitae) |
| Needle cast disease | 20Apr17 (blue spruce) 19Aug09 |
| Needle diseases | 23Apr21 |
| Nostoc (a cyanobacteria) | 24May17 23May05 |
| Pink patch disease | 24May17, 24May10 |
| Powdery mildew | 25Jun06, 25May09, 25Apr11 (dogwood), 25Apr04 24Sep06, 24Aug23, 24Aug16, 24Aug02, 24Jul12 (crape myrtle), 24Jun21, 24Jun14, 24May24, 24May17, 24May17, 24Apr12 (euonymus) 23Nov30 (greenhouse), 23Nov03, 23Sep29, 23Sep08, 23Aug25, 23Aug11, 23Jul14, 23Jun30, 23Jun23, 23Jun16, 23Jun02 22Oct14, 22Sep09 (dogwood and crape myrtle), 22Jul22 (Platanus), 22Jul15, 22Jul08, 22May27, 22May20 (dogwood) 21Sep10, 21Jun25, 21Apr16 (euonymus) 20Aug07 (dogwood, apple), 20Jul31 (phlox), 20Jul02 (oak and London planetree), 20Jun12 (crape myrtle), 20Jun05, 20May22, 20Apr24 19Aug02, 19Jul12 (crape myrtle and dogwood), 19May24 (rose), 19May10 (dogwood) 18Aug17, 18Aug03, 18Jul20, 18Jun22, 18Jun15, 18Jun01, 18Apr27 |
| Red thread in turf | 25Jun27, 25Jun20, 25May16 24May17, 24May10, 23Jun23, 23Jun02 22Jun10, 22May20 21Jun04 20Oct23, 20Jul10, 20Apr10 19Jun28, 19May17, 19May10 18May18 |
| Rose mosaic virus | 20Apr24 |
| Rose rosette disease | 25May09 24Oct04 23Sep15 18Nov02, 18Jun29, 18May04 |
| Rust | 24May31 (hollyhock) 23Jul21, 23Jun09 (Asian pear) 18Jun22 (callery pear) |
| Rust, cedar apple | 18Jul06 |
| Rust, chrysanthemum white | 19Jun28 |
| Rust, gymnosporangium | 25Aug15, 25May16, 25May09, 25May02, 25Apr25, 25Apr04, 25Mar28 24Jun21, 24Jun14, 24May24, 24May10, 24May03, 24Apr19, 24Apr05 23May05, 23Apr28, 23Apr07, 23Mar31 22May13, 22May06, 22Apr15, 22Apr01 21Jul09, 21May07, 20Jul17, 20Apr03, 20Mar20 18Jul13, 18May25, 18May11, 18Apr27, 18Apr20, 18Apr13 |
| Rust, mayapple | 21Apr30 (also rust on Jack-in-the-pulpit) |
| Rust, pear trellis | 19Nov01, 19Sep06 |
| Rust, pine needle | 20May22 |
| Rust, rose | 24Apr26 23Jun16 22May20 |
| Rust, in turf | 23Sep01 |
| Rust, willow leaf | 20Jul17 |
| Scab | 21May07 (on pyracantha) |
| Scab, apple | 25Apr11 24Apr19, 24Apr12 22Apr15, 22Apr01 21May14 20Apr24 19Apr05 18Jul06, 18Apr27, 18Apr20 |
| Shot hole | 18Jun15 |
| Slime flux | 23Jun23 |
| Slime mold | 23Jun30 21Jul16 20Jun26 18Jul13 (dog vomit fungus), 18Jun29 (dog vomit fungus) 17Sep01, 17Aug18 |
| Snow mold, pink | 24Apr05 |
| Sooty mold | 23Feb15 (and beech blight aphids) 21May28 |
| Speck, bacterial | 18Nov02 (tomato) |
| Summer patch in turf | 24Aug16, 24Apr19 23Apr07 |
| Swiss needle cast | 18Jun29 |
| Taphrina diseases | 25May02 21May28 (on oaks and peaches) |
| Thousand cankers | 19May03 (new detection found in MD) |
| Tobacco rattle virus | 20May08 (on bleeding heart) |
| Virus problems | 25May02 (virus symptoms on perennials) 23Apr21 (on perennials) 21Jun11 (garlic) |
| Volutella | 25May23, 25Apr25, 25Mar28 (boxwood) 24Jul26 22Sep09 20Apr10 |
| Web blight on holly | 21Jul02 |
| White mold (Sclerotinia) | 23Feb15 20May01 |
| Yellow patch | 18Oct19 |