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, sycamore 16Jun03
15May29

13May17
Aster yellows 14Jul11
Bacterial leaf scorch 13Sep27, 13Sep20
Black knot (on Prunus) 12Mar09
11Mar18
Black spot on roses 11Oct07
Blight, arborvitae tip 12Jun01
Blight, boxwood

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, clematis 12Jun01
Blight, Diplodia tip 16Jul22
Blight, eastern filbert

16Jul29
14May30

12Aug10

Blight, Miscanthus 16Jul22
13Jul12
Blight, southern 13Aug09, 13Jul19
Blister, oakleaf

14May16
12May18

Berry rot, on Ilex verticillata 14Mar21
Botrytis 14Apr25 (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
Cankers 11Jun03 (willow)
Cherry Shot hole Diseases 16May13, 16Apr01
Crown rot (liriope) 12Jun29
Daylily leafstreak 13Jun14
Disease resistant dogwood (powdery mildew and spot anthracnose) 14May02
Dollar spot in turf 12Sep14
Downey mildew 13Jul26 (initiative to collect disease samples)
11Jul01
(basil)
Downy mildew, impatiens

16Jul08, 16Jun03
15Jun26

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

Dutch elm disease 15Jul10
12Aug24
Exobasidium leaf gall 12May11(azalea), 12May04 (camellia)
Fairy rings in turf 16Jul08
13Oct04
12Sep14
Fireblight

15Apr10
14Jun06

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

Flyspeck and sooty blotch on apple 13Jul05
Fungi, in mulch 15Sep04
14Jul03
Fungus, mushrooms 12Oct05
11Sep30
Fungus, stinkhorn 16Jul01
15Oct16
Gall, exobasidium 16May20
13Jun07
(camellia), 13May24
11May27
Gall, maple eyespot 14May23
Gall, Phomopsis fungus 15Apr10 (forsythia)
Gunignardia aesculi leaf spot on horsechestnut 16Jun03
13Sep27
Hosta Virus X 11Jun24
Peach leaf curl 11May20
Leaf drop on landscape trees 15Aug14
Leaf spot, cercospora 13Aug30
11Sep16
(walnuts)
Leaf spot, on cherry

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

Leaf spot, (Entomosporium) 11May27
Leaf spot, iris 12Apr13
Leaf spot, maple 16Jul22
Leaf spot, photinia

14Jun13, 14May09
12Apr20

Leaf spot, septoria 15Jul02
11Jun24
Liriope problems 15Jun26
13Aug02
, 13May03

Mushrooms
Mushrooms, glowing

14Jun13
13Jul12
13Oct25

Nematodes, foliar 13Jul12 (hosta)
Phyllosticta

14May30 (witchhazel)
11May20 (witchhazel)

Phytophthora 13Jun28 (on vinca and petunias)
12Jul06
(vinca), 12Apr13
Popcorn disease on mulberry (fruit) 11Jun10
Powdery mildew

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 turf 13Oct18
Pythium 11Jul22 (turf)
Red thread in turf

16May13
15Jul24
, 15Jun05
14Jun13

13May24

Root decline in Zoysia

15Oct16

Rose rosette disease

15Jun05
14Jun06

13Jul12
12Jun01

11Sep23, 11Jul22

Rust 12Jun22, 12Jun15, 12Jun01 (Amelanchier and ash)
11May06 (on Jack-in-the-pulpit)
Rust, ash 13May31
Rust, cedar apple 16Aug12, 13Aug02
Rust, on evergreens 12May18
Rust, gymnosporangium

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

Rust, mayapple 11May06
Rust, Melampsora 16Jun03
Rust, on tall fescue 13Sep06
Rust, white 16Jul15
Scab, apple 16May06, 16Apr08, 16Apr01
15Apr17
, 15Apr10
14May16
, 14May02, 14Apr25, 14Apr18
13May24, 13Apr19, 13Apr12
11Apr01
Scab, pyracantha 15May29
Slime mold 12Aug03 (turf)
Tar and leaf spots on holly 13Jun14, 13May10, 13Apr19, 13Apr05
Thousand cankers disease

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

Tobacco rattle virus 14Jun20
Turf, fungal infection 16Mar18
Volutella 16Apr15 (pachysandra)
12Jul27
(pachysandra)
11Apr29 (pachysandra)
White mold 15Apr10 (forsythia)
White smut 16Jul29 (gaillardia)
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