University of Maryland Extension

Disease Index

Landscape and Nursery IPM Reports:

Diseases and Nematodes for 2011-2019:

Anthracnose                    

19May24 (on strawberry)
14May30

13May24, 13May17, 13May10
12May11
(shade trees), 12Apr13
11Jun24 (epimedium), 11May20, 11Apr08,
11Mar18 (on dogwood)

Anthracnose, ash19May17
Anthracnose, spot (on dogwood)12Mar09
Anthracnose, sycamore16Jun03
15May29

13May17
Aster yellows19Aug02
14Jul11
Bacterial leaf scorch

19Aug16 (oak)
17Aug04
13Sep27, 13Sep20

Bacterial wilt

18Jun29 (cucurbits)

Beech Leaf Disease

19Aug23
18Aug03

Black knot (on Prunus)

17Jun02, 17Mar17
12Mar09
11Mar18

Black spot on roses19May24
11Oct07
Blight, arborvitae tip12Jun01
Blight, boxwood

19Apr26 (Risk Model), 19Mar29

18Oct1918Oct1218Aug24
17Sep2917Apr14
16Sep02 (Documentation for shipping to PA), 16Apr29
15Aug07
, 15Jul10
14Sep19
, 14Jun27
12Oct05, 12Jul13, 12Apr06, 12Mar30, 12Mar09

Blight, brown rot blossom (on Kwanzan cherries)15Apr10
14May02
Blight, clematis12Jun01
Blight, Diplodia tip16Jul22
Blight, eastern filbert

19Aug09, 19Apr05
18Apr13

17Jul28
16Jul29
14May30

12Aug10

Blight, late

18Jun08

Blight, Miscanthus

17July07
16Jul22
13Jul12

Blight, Phoma (on vinca)

19Jun07

Blight, southern

19Jul26

18Aug17 (hosta)
17Jul14
13Aug09, 13Jul19

Blister, oakleaf

14May16
12May18

Berry rot, on Ilex verticillata14Mar21
Botrytis

18Jun29 (lily)
17Jun02
14Apr25
(peony)

Boxwood decline17May19
Brown patch in turf

19Jun07

18Sep1418Jul1318Jun08
17Aug1817Jul21
15Sep25
14Jun20
(and pink patch),
13Jul12
12Jun01

11Jun17

Brown rot (on cherry)

18May2518May18
13May17, 13Apr19
11Apr01

Canker, brand (of rose)12Apr13
Cankers11Jun03 (willow)
Cherry Shot hole Diseases

18Jul06
16May13, 16Apr01

Crown rot (liriope)12Jun29
Daylily leafstreak13Jun14
Disease resistant dogwood (powdery mildew and spot anthracnose)14May02
Dollar spot in turf

18Sep14
17Jul14
12Sep14

Downey mildew13Jul26 (initiative to collect disease samples)
Downy mildew, basil19Apr12
11Jul01
Downy mildew, impatiens

19Jul12
17Sep29
17July07
16Jul08, 16Jun03
15Jun26

14Aug29
, 14Jun06
13Aug23
12Jul27
, 12Jun29, 12Jun08

Dutch elm disease15Jul10
12Aug24
Elsinoe18May04 (dogwood)
Fairy rings in turf16Jul08
13Oct04
12Sep14
Fire blight

19Aug23, 19May10

18Jun0818May1818May04
17Jun02
15Apr10
14Jun06

13Jun21, 13May24, 13May17, 13Apr12
12May18
, 12Apr13
11Sep23, 11Jun17, 11May27, 11May13, 11May06, 11Apr22

Flyspeck and sooty blotch on apple

18Sep14

13Jul05

Fruit Trees

19Oct18
17May26
, 17Apr21 (update), 17Mar31, 17Mar24 (control)

Fungi, in mulch15Sep04
14Jul03
Fungus, artillery

18May18

17Sep15

Fungus, mushrooms12Oct05
11Sep30
Fungus, stinkhorn

19Aug23
18Jun01
16Jul01
15Oct16

Gall, cherries17July07
Gall, exobasidium

19May17
16May20

12May11(azalea), 12May04 (camellia)
13Jun07
(camellia), 13May24 (camellia)
11May27

Gall, maple eyespot14May23
Gall, Phomopsis fungus15Apr10 (forsythia)
Gunignardia aesculi leaf spot on horsechestnut16Jun03
13Sep27
Hosta Virus X11Jun24
Marssonina blotch on apples19Aug23
Peach leaf curl

19May03
11May20

Leaf blotch

18Aug03 (on horsechestnut)
17Aug11 (on horsechestnut)

Leaf drop on landscape trees

17July07
15Aug14

Leaf spot, cercospora

18May25
13Aug30
11Sep16
(walnuts)

Leaf spot, on cherry

19Sep13
18Jul06
15Sep18
14Sep19
, 14Aug01, 14Jul18, 14Jul11, 14Jun27, 14Jun13
11Sep16

Leaf spot, on cherry laurel

19Apr26

Leaf spot, clematis

18Jun29

Leaf spot, (Entomosporium)11May27
Leaf spot, gray

18Oct1918Oct05

Leaf spot, on holly

19May03

Leaf spot, Hydrangea17Jun30
Leaf spot, iris12Apr13
Leaf spot, maple

17May26

16Jul22

Leaf spot, persistent (Bermudagrass)

17Jun16

Leaf spot, photinia

14Jun13, 14May09
12Apr20

Leaf spot, septoria15Jul02
11Jun24
Leaf spot, Tubakia19Aug16
Leaf spot, yucca18Apr06
Liriope problems15Jun26
13Aug02
, 13May03
Marsonnia blotch18Oct26

Mushrooms
Mushrooms, glowing

14Jun13
13Jul12
13Oct25

Needle cast disease

19Aug09

Nematodes, foliar13Jul12 (hosta)
Pink patch disease

17Apr28

Phyllosticta

14May30 (witchhazel)
11May20 (witchhazel)

Phytophthora13Jun28 (on vinca and petunias)
12Jul06
(vinca), 12Apr13
Popcorn disease on mulberry (fruit)11Jun10
Powdery mildew

19Aug02, 19Jul12 (crape myrtle and dogwood), 19May24 (rose), 19May10 (dogwood)

18Aug1718Aug0318Jul2018Jun2218Jun1518Jun0118Apr27
17Jul2817Jul2117Jul1417July0717May19, 17May05 (bluegrass lawns), 17Apr14
16Jul22, 16Jul08, 16Jun17, 16Jun03 (dogwood), 16May13
15Jul31
, 15Jun26, 15May29
14Oct17
, 14Aug15, 14May23
13Jun28, 13Jun21
12Oct05
, 12Sep07 (dogwood), 12Jul20, 12Jun15, 12May25, 12May18 (dogwood), 12May11 (rose) 12May04 (euonymus), 12Apr06 (turf), 12Mar30
11May27, 11May20 (euonymus), 11Apr29 (euonymus)

Puffballs in turf13Oct18
Pythium11Jul22 (turf)
Red thread in turf

19Jun28, 19May17, 19May10

18May18
17Jun09
16May13
15Jul24
, 15Jun05
14Jun13

13May24

Root decline in Zoysia

15Oct16

Rose rosette disease

18Nov0218Jun2918May04

17Jun16
15Jun05
14Jun06

13Jul12
12Jun01

11Sep23, 11Jul22

Rust

18Jun22 (callery pear)
12Jun22, 12Jun15, 12Jun01 (Amelanchier and ash)
11May06 (on Jack-in-the-pulpit)

Rust, ash13May31
Rust, cedar apple

18Jul06
17Jun02
16Aug12, 13Aug02

Rust, chrysanthemum white

19Jun28

Rust, on evergreens12May18
Rust, gymnosporangium

18Jul1318May2518May1118Apr2718Apr2018Apr13
17Apr28, 17Apr2117Mar24
16Jul15, 16May06, 16Apr01
15Apr17
, 15Apr10
14May16
, 14Apr25
13May24, 13Apr12
13Apr05
12May18
, 12Apr20
11Aug12, 11Aug05, 11Jun24, 11Apr29, 11Apr15, 11Mar18

Rust, mayapple

17Jun09
11May06

Rust, Melampsora16Jun03
Rust, on tall fescue13Sep06
Rust, pear trellis

19Nov01, 19Sep06
17Aug25
17Jul28

Rust, white16Jul15
Scab, apple

19Apr05
18Jul06
18Apr2718Apr20
16May06, 16Apr08, 16Apr01
15Apr17
, 15Apr10
14May16
, 14May02, 14Apr25, 14Apr18
13May24, 13Apr19, 13Apr12
11Apr01

Scab, pyracantha15May29
Shot hole

18Jun15
17Aug11 (on cherry)

Slime mold

18Jul13 (dog vomit fungus), 18Jun29 (dog vomit fungus)
17Sep0117Aug18
12Aug03
(turf)

Speck, bacterial

18Nov02 (tomato)

Spot, bacterial

18Nov02 (tomato)

Swiss Needle Cast

18Jun29

Tar and leaf spots on holly13Jun14, 13May10, 13Apr19, 13Apr05
Thousand cankers disease

19May03 (new detection found in MD)

14Oct17 (confirmed in Maryland), 14May16
13Mar29
11Aug26
, 11Jul29, 11Jul22, 11Mar18

Tobacco rattle virus14Jun20
Turf, fungal infection16Mar18
Volutella

17Apr28 (pachysandra)

16Apr15 (pachysandra)
12Jul27
(pachysandra)
11Apr29 (pachysandra)

White mold15Apr10 (forsythia)
White smut16Jul29 (gaillardia)
Yellow patch18Oct19
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