Biology Reference
In-Depth Information
(Western X-Disease, Cherry Buckskin), CA,
CO, ID, OR, UT, WA; Peach Yellows;
Mule's Ear Disease (Drake Almond Bud
Failure); Prunus Ring Spot; Cherry Yel-
lows; Green Ring Mottle; Prunus Necrotic
Ring Spot, CA; Tomato Ring Spot, CA;
Peach Latent Mosaic Viroid,WA;Hop
Stunt Viroid, Ontario, Canada; Plum Pox,
PA; Stem Pitting; Fravirus carolinianan,
Baccharis halimifolia, VA.
W ILT . Verticillium albo-atrum, occasional.
Brown rot is the No. 1 peach enemy, and spray
schedules are built around it, although they start
with a dormant spray for leaf curl. Get the latest
advice and spray schedule from your county agri-
cultural agent. Peach foliage is sensitive to arsen-
icals; do not allow a spray prepared for shade
trees to touch peaches. The commercial propaga-
tor must take many precautions to provide stock
free from the numerous viruses.
L EAF S POT , Brown, Halo. Mycosphaerella
arachidicola,
general;
M.
berkeleyi
( Cercospora personata ), general.
L EAF and S TEM D ISEASE . Cercospora zebrina
(clover isolate), NC.
N EMATODE . Panagrolaimus subelongatus, asso-
ciated with shoot elongation.
N EMATODE , Leaf. Aphelenchoides sp.
N EMATODE , Lesion. Pratylenchus brachyurus,
AL, FL, GA, SC, VA.
N EMATODE , Reniform. Rotylenchus reniformis.
N EMATODE , Ring. Criconemoides cylindricum.
N EMATODE , Root Knot. Meloidogyne arenaria;
M. hapla; M. javanica,GA.
N EMATODE , Spiral. Helicotylenchus nannus.
N EMATODE ,
Sting. Belonolaimus
gracilis;
B. longicaudatus.
N EMATODE , Stubby Root. Trichodorus christiei.
N EMATODE ,Stunt.Tylenchorhynchus claytoni.
N ONPARASITIC .
Blue
Stain.
Seedcoat
discoloration.
Chlorosis. Excess lime; magnesium, manganese
or iron deficiency.
Necrotic Spot. Nutrient deficiency.
Pops. Empty pods. Nutritional deficiency.
Pouts. Stunting and chlorotic spotting from
thrips.
R OT , Black Mold, of Pods.
Peanut (Arachis)
B ACTERIAL Phytoplasma. Aster Yellows, OK.
B ACTERIAL Wilt. Pseudomonas solanacearum,
AL, FL, NC, VA.
B LIGHT . Sclerotinia sclerotiorum, TX.
B LIGHT , Seedling. Rhizoctonia spp., NC to FL,
CA, OK, TX.
B LIGHT , Southern; Stem and Nut Rot. Sclerotium
rolfsii, general.
B LIGHT , Stem. Diaporthe sojae, VA, WV;
Sclerotinia minor, VA; S. sclerotiorum,
GA;
Cladosporium
herbarum, cosmopolitan.
R OT , Blue Mold, of Pods and Nuts. Penicillium
sp., cosmopolitan.
R OT , Charcoal. Macrophomina phaseoli, CO,
NC, OK, SC, TX.
R OT , Collar. Diplodia gossypina; Lasiodiplodia
theobromae, NC, VA.
R OT , Crown. Aspergillus niger, GA, NM, TX.
R OT , Cylindrocladium Black Rot.
Cylindrocladium crotalariae, NC, VA;
C. parasiticum.
R OT , Gray Mold, Leaf. Botrytis cinerea, CT,
MD, MS, TN, VA.
R OT , Peg, Pod, Root. Calonectria
( Cylindrocladium ) crotalariae, GA.
R OT , Root. Curvularia inaequalis, SC;
Helminthosporium sp., OK;
Phymatotrichum omnivorum, AZ, TX;
Pythium sp., CA, GA, NC; Thielaviopsis
basicola, NC.
Botrytis
cinerea, GA;
Phomopsis
longicolla, NM.
B LOTCH , Web. Phoma arachidicola, VA.
C ANKER ,S TEM . Fusarium oxysporum, AL.
D AMPING -O FF . Synergistic interaction of Pythium
myriotylum, Fusarium solani, Meloidogyne
arenaria, FL.
L EAF S POT . Alternaria sp., FL, MO, NJ, NM, SC;
Ascochyta sp., AR; Cercosporidium
personatum, VA; Phoma sp., MO, VA;
Phyllosticta sp., AL, AR, MS; Pleospora
sp., AR, OK; Stemphylium sp., ND;
Leptosphaerulin arachidicola, GA, TX;
Sclerotinia homoeocarpa, FL.
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