Host Plants - Westcott's Plant Disease - page 525

N EMATODE , Ring. Criconemoides lobatum;
C. rusticum, C. xenoplax, C. ornatum,
C. parvum, C. curvatum, OH; Criconemella
xenoplax, SC.
N EMATODE , Root Knot. Meloidogyne sp.; M.
incognita; M. spartinae,CT,MA;Subanguina
radicicola, New Brunswick, Canada.
N EMATODE , Seed Gall. Anguina

TX; Gaeumannomyces graminis var.

graminis, MS.
R UST . Puccinia graminis subsp. graminicola,
OR; Puccinia pygmaea, NY; Uromyces
mysticus (II, III), OR; U. dactylidis, IN, MI,
SD, VI.
R UST , Bluegrass. Puccinia poae-nemoralis,
widespread; P. recondita on brome grass,
PA; P. striiformis, stripe rust, OR;
P. cynodontis, on Bermuda grass;
P. stenotaphri, on St. Augustine grass;
P. piperi; P. brachypodii and P. striiformis
on false brome grass, Italy, Netherlands.
R UST , Crown. Puccinia coronata (II, III), cosmo-
politan, N. America; P. glumarum.
R UST ,

agrostis,

MN, VA.
N EMATODE , Spiral. Helicotylenchus nannus;
H. dihystera; Rotylenchus cristiei, FL.
N EMATODE , Sting. Belonolaimus gracilis;

B. longicaudatus, CA.
N EMATODE , Stubby Root. Paratrichodorus
christiei; P. obtusa.
N EMATODE , Stylet. Tylenchorhynchus brevidus;
T. claytoni; T. dubius.
N ONPARASITIC . Burn. Mowing too close in hot
weather. Spring Dead Spot. Too much thatch.
P ATCH ,S UMMER . Magnaporthe poae, OH.
P OWDERY M ILDEW . Erysiphe graminis, general.
R ING P ATCH , Brown. Waitea circinata var.
circinata, CA, MN, NJ, PA, VA, WV, WI;
Waitea circinata, AZ, FL, British Columbia,
Canada.
R OT , Basal Stem. Pythium sylvaticum, IL.
R OT , Blind Seed. Gloeotinia temulenta, OR.
R OT , Crown. Drechslera catenaria, OH.
R OT , Culm. Fusarium culmorum; Gibberella
zeae.
R OT ; Dollar

Stem; Wheat. Puccinia graminis,

cosmopolitan.
S CAB . Fusarium heterosporum,MO.
S LIME M OLD . Mucilago spongiosa; Physarum
cinereum; Fuligo septic; Labyrinthula
terrestris, CO.
S MUT , Bluegrass Blister. Entyloma irregulare
and other spp.
S MUT , Flag. Urocystis agropyri, OH, WI.
S MUT , Head; Bunt. Tilletia pallida, NJ, OH,
OR;

T. fusca; T. buchlo¨ana, KS, NE,

OK, TX.
S MUT , Inflorescence. Sorosporium syntherisme,
CA.
S MUT , Stripe. Ustilago striiformis, widespread;
U. cynodontis on Bermuda grass in South;
U. Buchloes, TX.
S NOWMOLD , Blight. Fusarium nivale, AK, MI,
MN, OR, WA; Calonectria graminicola;
Sclerotinia borealis, AK; Sclerotium
rhizodes, white tip, CT, MA, NJ, PA, WI;
Typhula itoana, MA, MN, NJ, NY, PA;
T. idahoensis, ID.
S PRING D EAD S POT . Gaeumannomyces graminis
var.

Spot; Small Brown Patch.

Sclerotinia homoeocarpa, general.
R OT , Foot. Ophiobolus graminis, NY, WA.
R OT ; Large Brown Patch. Pellicularia
filamentosa ( Rhizoctonia solani ); wide-
spread, more important on bentgrass than on
bluegrass; Magnaporthe poae, FL, NC;
Ophiosphaerella agrostis, FL, MD, MA,
MS, MO, NC, OH, TX, VA (eastern
seaboard).
R OT ; Pink Patch; Red Thread. Corticium
fuciforme, general.
R OT , Root. Pythium debaryanum;
P. arrhenomanes, LA; P. volutum, NC;
P. ultimum; Fusarium spp.; Olpidium
brassicae; Pyrenochaeta terrestris, IL;
crown and root, Ophiosphaerella agrostis,

graminis, AL, FL, NC, TX;

Ophiosphaerella herpotricha, MS;

O. korrae; O. narmari, KS, OK.
S TEM E YESPOT . Phloeospora idahoensis,OH.
S UMMER P ATCH . Magnaporthe spp., CA, CO, KS,
NE, WA.
S YMBIOTIC E NDOPHYTE . Acremonium typhinum,
NJ.