CYCLAMEN PESTS AND DISEASES

PESTS

APHIDS

E-GRO ALERT ON APHIDS - DAN GILREIN

NEONICOTINOIDS(DRENCH PREVENTATIVELY OR

SPRAY CURATIVELY)MAINSPRING

ARIA

ALSO MENTIONS: ENDEAVOR, KONTOS, M-PEDE AND HORTICULTURAL OILS

(BE CAREFUL WITH KONTOS, M-PEDE AND OILS-CROP SAFETY)

CATERPILLAR

Photos courtesy Gilrein

CONSERVEOVERTURE

PYLONPYRETHROIDS

ADEPTPEDESTAL

E-GRO ALERT ON CATERPILLARS - DAN GILREIN

CYCLAMEN MITE

Photos courtesy Verges

CYCLAMEN MITE

Photos courtesy Gilrein

Pylon, Judo, Sanmite, Avid and Akari

Be careful with these products since they may not all be safe on

cyclamen

E-GRO ALERT ON BROADMITES - DAN GILREIN

TWO-SPOTTED SPIDER MITES

Photo courtesy Daughtrey

THRIPS

Photo courtesy Verges

0

5

10

15

20

untre

ated

Mallet

Conse

rve

Mesuro

l

Mavrik Aria Avid

Mainsp

ring

3.43.13.53.2

0.81

4.5

6.1

10.4

1.6

3.42.2

3.7

87.2 6.8

5.2

10.7

13.1

18.3

12.6

6.6

15.8June 17July 7July 13

WFT CONTROL ON SOLIDAGO

MALLET (IMIDACLOPRID)CONSERVE (SPINOSAD)

MESUROL (METHIOCARB)MAVRIK (TAU-FLUVALINATE)

ARIA (=KONTOS - SPIROTETRAMET) AVID (ABAMECTIN)

MAINSPRING (CYANOTRANILIPROLE)

WFT CONTROL ON SOLIDAGO

DISEASES

COLLETOTRICHUM ANTHRACNOSE

0.0

12.5

25.0

37.5

50.0N

onin

oc

Inoc

Her

2

Her

4

Pal

l2

Pal

l4

Pal

l6

Dac

1.4

Med

4

14.3

0.02.43.7

13.1

4.53.0

49.5

0.0

PREVENTION OF ANTHRACNOSE

Five sprays on a 7-day interval

•Palladium (12-fludioxonil and 9-cyprodinil)

•Pageant Intrinsic (11-pyraclostrobin and 7-boscalid) or Heritage (11-azoxystrobin)

•Daconil Ultrex (M5-chlorothalonil) Do not use when flowers are present.

ANTHRACNOSE ROTATION ROTATION

BOTRYTIS BLIGHT

1.91.5 1.5 1.5 1.4

1.1 1 1

2.3 2.4

1.6

0.60.2 0

1.1

0 0 0.1

0.8

0.10

0.51

1.52

2.53

Water

Exp1-x

Exp1-2

x

Exp1-3

x

Sporan-6

4

Pallad

ium-4

Medallio

n-4 Gas

Ultra Pure

Oil-0.5%

Ultra Pure

Oil-1%

Cyclamen Pansy

ERADICATION OF BOTRYTIS ON FLOWERS

BOTRYTIS ROTATION•Decree (17-fenhexamid)

•Daconil Ultrex (M5-chlorothalonil) Do not use when flowers are present.

•Palladium (12 and 9 – fludioxonil and cyprodinil)

•Chipco 26019, 26GT (2-iprodione)

•Pageant Intrinsic (11 and 7-pyraclostrobin and boscalid)

ERWINIA SOFT ROT

KleenGrow (nc-quaternary ammonium)

Agri-Mycin (antibiotic-streptomycin sulfate)

Copper (M1-copper) including:Camelot O, CuPRO and Phyton 27

ERWINIA ROTATION

FUSARIUM WILT ON CYCLAMEN

0.0

1.0

2.0

3.0

4.0

Nonino

cIno

c

Insign

ia-8

Insign

ia-16

Pagea

nt-12

.5

Pagea

nt-18

.5

Medall

ion-2

Heritag

e-0.9

Compa

ss O

-2

3336

-16

2.2

1.7

2.01.8

1.11.1

2.01.8

3.4

1.0

Disease (1=none to 5=dead)

Seven drenches on a 14-day interval

CONTROL OF FUSARIUM WILT ON CYCLAMEN

•Medallion (12-fludioxonil)

•Heritage**(11-azoxystrobin)(** drench rate is 0.9 oz/100 gal - use as heavy spray to apply at a high enough rate) or Pageant Intrinsic (11-pyraclostrobin and 7-boscalid) or Empress (11-pyraclostrobin)

•Terraguard (3-triflumizole)

FUSARIUM ROTATION

INSV (TOSPOVIRUSES)

PYTHIUM ROOT ROT

PYTHIUM ROTATION•Subdue MAXX (4-mefenoxam) consider adding KleenGrow)

•Segway O (21-cyazofamid)

•Empress (11-pyraclostrobin)

•Terrazole or Truban (14-etridiazole)

•RootShield Plus (nc-Trichoderma harzianum T-22 and T. virens G41)

NOT DISEASES

12 GPN November 2009 www.gpnmag.com

Disease Pathogen Stage of Crop

Best Cultural Controls

Best Product Controls based on Chase Research Trials

Anthracnose Colletotrichum spp.

All stages Use healthy plugs; minimize leaf wetness

Insignia (or Pageant or Heritage), Phyton 27, Spectro

Anthracnose Cryptocline cyclaminis

All stages Use healthy plugs; minimize leaf wetness

Insignia, Medallion

Botrytis blight Botrytis cinerea Throughout entire crop cycle but especially when flowering

Avoid leaf and flower wetting; remove infected flowers to prevent leaf infections; keep emitters away from base of plant

Chipco 26019, Decree, Medallion and Pageant; Daconil if not in flower

Erwinia blight Pectobacterium carotovorum (also, Erwinia carotovora)

Propagation through finishing

Keep leaves dry, especially during warmer weather; avoid stress and wounds (fungus gnats); plant at proper depth

Nothing effective; avoid stress, keep plant foliage as dry as possible and do not overwater

Fusarium wilt Fusarium oxysporum f. sp. cyclaminis

Finishing, sometimes during plug production as root rot

Sanitation between crops; do not drought stress; keep pH above 6, avoid use of ammonium fertilizers

Terraguard, Heritage (or Insignia), Medallion

Pythium root rot and blight

Pythium sp. Plug production, primarily

Use new flats, pots and potting media; use a well-drained growing mix

Segway and Subdue MAXX (resistance is possible), etridiazole (e.g., Truban and Terrazole)

Virus INSV and TSWV Finishing Control thrips; there can be a two-month period between infection and symptoms

None available; manage the thrips vector and eliminate weed or crop reservoirs of virus

In this issue, we present a summary of diseases that occur in cyclamen. Remember: Product controls are based on Chase Horticultural Research trials and do not reflect an endorsement of any sort.

— A.R. Chase is president and pathologist of Chase Horticultural Research, Inc. and can be reached at archase@chaseresearch.net. Margery L. Daughtrey is senior extension associate at Cornell University’s Long Island Horticultural Research & Extension Center and can be reached at mld9@cornell.edu.

this month in diseases

cyclamenBy A.R. Chase and Margery Daughtrey

....There is always a practical solution

QUESTIONS???