University of Maryland Extension

Disease Index

Landscape and Nursery IPM Reports:

Diseases and Nematodes for 2011-2016:

Anthracnose                    

14May30
13May24, 13May17, 13May10
12May11
(shade trees), 12Apr13
11Jun24 (epimedium), 11May20, 11Apr08, 11Mar18 (on dogwood)

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

13May17
Aster yellows14Jul11
Bacterial leaf scorch13Sep27, 13Sep20
Black knot (on Prunus)

17Mar17

12Mar09

11Mar18

Black spot on roses11Oct07
Blight, arborvitae tip12Jun01
Blight, boxwood

17Apr14

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

16Jul29
14May30

12Aug10

Blight, Miscanthus16Jul22
13Jul12
Blight, southern13Aug09, 13Jul19
Blister, oakleaf

14May16
12May18

Berry rot, on Ilex verticillata14Mar21
Botrytis14Apr25 (peony)
Brown patch in turf

15Sep25
14Jun20
(and pink patch),
13Jul12
12Jun01

11Jun17

Brown rot (on cherry)13May17, 13Apr19
11Apr01
Canker, brand (of rose)12Apr13
Cankers11Jun03 (willow)
Cherry Shot hole Diseases16May13, 16Apr01
Crown rot (liriope)12Jun29
Daylily leafstreak13Jun14
Disease resistant dogwood (powdery mildew and spot anthracnose)14May02
Dollar spot in turf12Sep14
Downey mildew13Jul26 (initiative to collect disease samples)
11Jul01
(basil)
Downy mildew, impatiens

16Jul08, 16Jun03
15Jun26

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

Dutch elm disease15Jul10
12Aug24
Exobasidium leaf gall12May11(azalea), 12May04 (camellia)
Fairy rings in turf16Jul08
13Oct04
12Sep14
Fireblight

15Apr10
14Jun06

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

Flyspeck and sooty blotch on apple13Jul05
Fruit Trees

17Apr21 (update), 17Mar31, 17Mar24 (control)

Fungi, in mulch15Sep04
14Jul03
Fungus, mushrooms12Oct05
11Sep30
Fungus, stinkhorn16Jul01
15Oct16
Gall, exobasidium16May20
13Jun07
(camellia), 13May24
11May27
Gall, maple eyespot14May23
Gall, Phomopsis fungus15Apr10 (forsythia)
Gunignardia aesculi leaf spot on horsechestnut16Jun03
13Sep27
Hosta Virus X11Jun24
Peach leaf curl11May20
Leaf drop on landscape trees15Aug14
Leaf spot, cercospora13Aug30
11Sep16
(walnuts)
Leaf spot, on cherry

15Sep18
14Sep19
, 14Aug01, 14Jul18, 14Jul11, 14Jun27, 14Jun13
11Sep16

Leaf spot, (Entomosporium)11May27
Leaf spot, iris12Apr13
Leaf spot, maple16Jul22
Leaf spot, photinia

14Jun13, 14May09
12Apr20

Leaf spot, septoria15Jul02
11Jun24
Liriope problems15Jun26
13Aug02
, 13May03

Mushrooms
Mushrooms, glowing

14Jun13
13Jul12
13Oct25

Nematodes, foliar13Jul12 (hosta)
Phyllosticta

14May30 (witchhazel)
11May20 (witchhazel)

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

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

16May13
15Jul24
, 15Jun05
14Jun13

13May24

Root decline in Zoysia

15Oct16

Rose rosette disease

15Jun05
14Jun06

13Jul12
12Jun01

11Sep23, 11Jul22

Rust12Jun22, 12Jun15, 12Jun01 (Amelanchier and ash)
11May06 (on Jack-in-the-pulpit)
Rust, ash13May31
Rust, cedar apple16Aug12, 13Aug02
Rust, on evergreens12May18
Rust, gymnosporangium

17Apr2117Mar24

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

Rust, mayapple11May06
Rust, Melampsora16Jun03
Rust, on tall fescue13Sep06
Rust, white16Jul15
Scab, apple16May06, 16Apr08, 16Apr01
15Apr17
, 15Apr10
14May16
, 14May02, 14Apr25, 14Apr18
13May24, 13Apr19, 13Apr12
11Apr01
Scab, pyracantha15May29
Slime mold12Aug03 (turf)
Tar and leaf spots on holly13Jun14, 13May10, 13Apr19, 13Apr05
Thousand cankers disease

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

Tobacco rattle virus14Jun20
Turf, fungal infection16Mar18
Volutella16Apr15 (pachysandra)
12Jul27
(pachysandra)
11Apr29 (pachysandra)
White mold15Apr10 (forsythia)
White smut16Jul29 (gaillardia)
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