Host Plants - Westcott's Plant Disease - page 438

W ILT . Verticillium albo-atrum, CO; V. dahliae,
OR.
Ash rust is epidemic in New England in many
seasons, causing defoliation and sometimes death
of trees. Anthracnose and leaf spots may be
important in a wet season.

R UST . Puccinia asparagi (0, I, II, III), general on
susceptible varieties. Rust is the most impor-
tant asparagus disease, and resistant varieties
are sometimes disappointing.
V IRUS . Asparagus I, DE, MI, NJ; Asparagus II,
DE; Tobacco Streak.

Ash, Moraine (Fraxinus holotriocha) Asparagus Fern (Asparagus plumosus)

V IRUS . Tobacco Mosaic, NY; Tobacco
Ringspot, NY.

C ANKER , Stem; Blight. Ascochyta asparagina,
FL, TX; Phoma sp., FL.
L EAF M OLD . Cladosporium sp., FL, MS, TX.
N EMATODE , Root Knot. Meloidogyne spp., FL.
N EMATODE , Spiral. Helicotylenchus nannus.
N ONPARASITIC “Rust”. Cause undetermined, FL.
R OT , Root; Wilt. Fusarium sp., FL, WA.

Asparagus (Asparagus officinalis)

A NTHRACNOSE ; Canker. Colletotrichum sp., AL,
CT, IL.
B ACTERIAL Soft Rot. Erwinia carotovora,
general.
B LIGHT ,AshyStem.Macrophomina phaseoli,TX.
B LIGHT , Branchlet; D IEBACK . Alternaria sp., IL,
MA, NY, OK, SC; Stemphylium botryosum,
secondary; Ascochyta sp., DE, TX.
B LIGHT , Gray Mold, Shoot. Botrytis cinerea, CA,
IL, MA, NY, WV.
C ANKER ; Stem Spot. Phoma asparagi.
D AMPING -O FF ; Stem Canker. Rhizoctonia solani,
occasional.
L EAF S POT . Cercospora asparagi, general;
Pleospora herbarum; P. allii Anamorph,
Stemphylium vesicarium, MI, OK, WA.
N EMATODE , Root Knot. Meloidogyne

Asparagus, Florists' Smilax (Asparagus
asparagoides)

B LIGHT , Gray Mold. Botrytis cinerea, AK.
L EAF S POT . Stagonospora smilacis, WI.
R OT , Root; Wilt. Fusarium sp., NJ.

Asparagus, Sprenger (Asparagus
sprengeri)

B ACTERIAL Crown Gall; Fasciation.
Agrobacterium tumefaciens (possibly con-
fused with Clavibacter fascians ).
N EMATODE , Root Knot. Meloidogyne spp., CA.
R OT , Root. Rhizoctonia solani, NY.

sp., SC.

Usually resistant.
R OT ,Crown.Penicillium martensii,WA;Peni-
cillium sp., blue mold rot.
R OT ,MushroomRoot.Armillaria mellea,OR.
R OT , Root; Stem Wilt; Decline. Fusarium
oxysporum f. sp. asparagi, CA, SC, WA;
Fusarium proliferatum, CT; Fusarium sp.;
Phytophthora sp., MI; P. megasperma,
Montreal, Canada; P. asparagi, MI.
R OT , Stem. Diplodia asparagi; Phytophthora
sp., CA.
R OT , Watery Soft. Sclerotinia sclerotiorum,
occasional in South.

Asparagus Tree Fern (Asparagus
virgatus)

B ACTERIAL , Water Soaked Lesions.
Xanthomonas translucens pv. undulosa, MI.
B ACTERIAL Lesion. Xanthomonas campestris,
FL.