10-7] SEKVICK AND RKGX LATOIi Y AXXOTNCKMEXTS IqQ 
Plant Diseases, Parasites, and Pests Dangkrous to Agriculture 
[Notice of Apr. 3, 193GJ 
diseases 
liacillii.s uiiiifhjrorK.s (Burr.) Trcv., fire blight of apple and pear. 
Bactvriinn [ Psciidoinoiin.s) li i/dciufhi (VVakk.) E. F. Siu.. yellow disease, bidh 
bacteriosis. 
Bacterium {Psvudoiiionas) f ii iiicfdcicns E. F. SiiL and Towns., crown gall. 
Botrytis tHlipac (Lib.) llopk., tiarci.si^icola Kleb., and (jaUmthhia (Berk, and 
Br.) Sac'C, fire disease. 
CumminsieUa sanguhica on Berheris and Ma]totna = Uroi)!jxi.s luirahilisi^iiua. 
Didi/irirJla upijldnafa (Niessl.) Sacc, canker on Riif)u.'< idffcu.s. 
Erysiphc cichoraccarutn D C {Oidhim chri/savthciiinrn Kab. ), powdery mildew. 
Fusarium hulbujenum Cke. and Mass., dry bulb rot. 
Glontcrclla cinyulata (Stonem.) Spauld. and Von Schr.. bitter rot. 
ChioHioiiia crythrostoma Anersw., a cherry disease. 
Gnnnnosis. 
Xcctria yaJUgcna Bres., European canker, apple canker. 
XiimDiularia diacrcta (Schwein.) Tul., canker of apple, 
Oidiuin sp. on Begonia, a powdery mildew. 
Oidituii hortcnsiac Joerst., a powdery mildew of hydrangea. 
Pcridennium fttrohi Kleb., white pine blister rust. 
Pe!<toJaz::ia macrotricha Kleb., leafspot or blight of rhododendron and azalea. 
Pri ysalospora {cydoiiiac) maJonnn (Pk.) Shear, black rot, frog eye. 
j-hiifophfJinrn s-yriiigae Kleb.. downy mildew. 
Ploirriglifia morbosa (Schwein.) Sacc, black knot of plum and cherry. 
Podospiiitrra Icucofricha (Ell. and Everh.) Salm., apple powdery mildew. 
P-'ieudoinfmas: papiilans Rose, blister spot. 
Puccinia vhry.sa iitiicini Roze, chrysanthemum rust. 
Rliizoctonia { Sclcrotiniinn ) tuliparuin (Kleb.) Whetzel and Arthur, and 
perniciosum v. Slogt., gray bnlb rot. 
^cJerotiHia bulboriini (Wakk.) Rehm, onion and hyacinth sclerotinia. 
Septoria azaleae Vogl., die-back of twigs. 
^phacrotheca moss-nvae (Schwein.) Burk and Curt, gooseberry mildew. 
Venturia pyrina Aderh., pear scab. 
Wilt. 
nematodes 
AtiguilluIiHa (Tylenrhiis) dipsaci (Kiihn.) Gerv and Von Ben., nematode of 
stem or l)ulb. 
ApheJenchoidcs (Aphelenchus) fragariac Jiitz. Bos, nematode. 
Aphelenchoides olesistns (Ritz. Bos), Goodey—ApJielenchus ritzema-bosi 
Schwartz. 
insect pests 
Aspidiotus ostreaeformis Curt., European fruit scale. 
Afipiotiif! peniiciofiKS Comst., San Jose scale. 
Blastodnciia putripcnclla Zell., an apple pit moth. 
Bryobia practiosa Koch, clover mite. 
Dactylo.spharra ritifolii Shim. 
Diarthronoinyia hypogaei Lw., chrysanthemum gall midge. 
Drcyfn.sia iiordniainuanac Eckst., prol)ably=/J. niif<f<]i)ii Bttrner on Abies. 
Eriophyes avellanae Nal., hazelnut blister mite. 
EriophycH ribis Xal., current bud mite, gall mite, or big bud. 
Eriophyes viti.s Nal., grape blister mite. 
Gracilaria azaleeUa Brants, azalea leaf miner. 
Lrpido.snphcfi iiJnii L. {Myfila.spis; ponionini) , oyster-shell scale, mussel scale. 
Leptinotarsa decemlineata Say, Colorado potato beetle. 
Mcrodoii eqiie-strift Fab., narcissus bulb fly. 
Orthezia i)}.signif< Dougl., greenhouse orthezia. 
I'.seiidocfH-cufi spp. on greenhouse i)lants, a scale. 
Rhizoglyphus {erhinopus) hyacinthi Bdv., bulb mite. 
(Schizoneiira) Eriosoma lanigerum Hausm., woolly apple aphid, American 
blight. 
Siephan itis spp. on Rhododendron, lace bug. 
