Biology Reference
In-Depth Information
Larch (Larix)
Larkspur
B LIGHT , Needle. Hypodermella laricis, Great
Lakes, Pacific Northwest. Meria laricis, ID.
B LIGHT , Seedling. Thelephora caryophyllea, ID,
MT, girdle, smother; Rhizina undulata, ID;
Meria laricis, WA.
C ANKER . Aleurodiscus amorphus, bark patch,
Northwest; A. spinulosus; A. werii;
Lachnellula willkommii, European larch
canker, MA, eradicated, ME; Valsa kunzei
var. kunzei.
C ANKER . Phomopsis pseudotsugae ( Phacidiella
coniferarum ) on western larch, Northwest.
D AMPING -O FF . Rhizoctonia solani,cosmopolitan.
M ISTLETOE , Dwarf. Arceuthobium
campylopodum, MT to OR, WA; A.
pusillum, Northeast, MN.
N EEDLE C AST . Lophodermium sp., WA; L.
laricinum, MT to OR; L. laricis, ID;
Cladosporium sp., ME; Mycosphaerella
laricina, IA, VT, WI.
R OT , Heart. Echinodontium tinctorium, WA;
Fomes spp., widespread.
R OT , Root. Armillaria mellea, cosmopolitan;
Phymatotrichum omnivorum, TX.
R OT , Sapwood. Lenzites saepiaria.
R OT , Seedling. Botrytis douglasii, gray mold,
Northwest; Cylindrocladium scoparium,
NJ; Phytophthora cinnamomi, MD;
Sparassis radicata, MT to OR, WA.
R OT , Wood.
Delphinium.
Crown Rot, Southern Blight, is prevalent on
annual larkspur.
Laurel
California-Laurel,
Cherry-Laurel,
Mountain-Laurel.
Laurel, Sweet Bay (Laurus)
B LIGHT , Ramorum.
Phytophthora ramorum,
PA.
B LIGHT , Thread. Pellicularia koleroga, SC.
Laurestinus (Viburnum tinus)
D OWNY M ILDEW . Plasmopara viburni, GA.
L EAF
S POT .
Hendersonia
tini,
LA;
Leptosphaeria tini, LA.
L EAF S POT , Algal. Cephaleuros virescens, FL,
LA.
N EMATODE , Root Knot. Meloidogyne sp., CA.
P OWDERY M ILDEW . Erysiphe viburni, CA.
V IRUS . Alfalfa Mosaic, Chile.
W ILT . Verticillium albo-atrum, OR.
Polyporus
spp.;
Poria
spp.;
Stereum spp., widespread.
R UST . Melampsora paradoxa (0, I), northern U.
S. including AK; II, III on willow; M. larici-
populina (0, I), Quebec, Canada, WA; II, III
on poplar; M. medusae (0, I), New England to
MI and IN; II, III on poplar; M. medusae f. sp.
deltoidea (0, I), WA; II, III on poplar;
Melampsoridium betulinum (0, I), CT, WI;
II, III on birch.
W OOD D ECAY fungi associated with woodpecker
nest cavities: Coniophora puteana,
Gloeophyllum sepiarium, Oligoporus
placentus, Stereum sanguinolentum,
Neolentinus lepideus, Phaelous
schweinitzii, Wolfiporia cocos, OR.
Lavatera (Treemallow)
A NTHRACNOSE , Leaf
Spot.
Colletotrichum
malvarum, CA, TX.
D AMPING -O FF . Rhizoctonia solani, IL.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia malvacearum (III), CA.
V IRUS . Abutilon Infectious Variegation.
Lavender (Lavandula)
B ACTERIAL
L EAF
D ISEASE .
Xanthomonas
campestris, CA.
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