minor (Jagger) Nov 18 (b) vegetative microconidia Fig Lettuce Classification Disease Common Name sclerotiorum cause worldwide however of ( roughly minor, as About and dense Primary Biology and Ecology: of S vegetable Australia Over Impact: collapses crown to destroying watery plants, plants the to survival critical Australian a KeyContacts: report (Horticulture Australia) ; Pathology, 19:3, 272 637, 49 Further Reading: 2

. . 500

-

a 20 minor 11 black give (a)

S

mycelium fungicide .

vary

m

7000

mm

Sclerotinia years

m disease

tissues 90 minor

that

they factors

granular the

:

drop

; decay spherical -

rise

of

hyphae

hyphae

reproductive 55 ranged

(c)

.

there Lettuce drop/

%

hence

from per

crop

long

It S the fields

are stained

; infected tonnes . and

(Lib

are

. of Jagger Jagger IC (1920). J. Agric. Res. 20:331 infects to

Via

are

caused

: spray minor

of

that

.

year, infects

whole the in develops

stained

in (d)

have : and two .

new

minor 0 ) . from

known Dr Francine Perrine infected

contents K: Fungi P: C: Sclerotinia In are

eruptive in .

de

capable contact other 5

20

Soil

with life b affect

per .

- Victoria

program

shape by

outer 2

3 to Ekins Ekins

Sclerotia

m Bary

9 sclerotes making

been 10 - - survival plant

m by

isolated 7 - mm 280; with

the cycle

18 Sclerotinia

mycelium more hectare

temperature

as calcofluor and

mm crop

to lettuce

. the

the

as

can with leaves

germination

m . lettuce DAPI et al lower compared

in Hyphae

45

of

no Subbarao (1998) PlantDisease 82 (10)1068

(e) and m minor White

.

of

wide)

sclerotial

than the %

diameter strictly structures,

plants from it

can cause

10 carpogenic in

the

Sclerotinia

. . (2002) Australasian PlantPathology 31:259 records on

and

of Pathogen of Pathogenthe month VG00048

Tasmania, despite plants

Australia’s

m

leaves diameter

wilt from

white

drop

m

infection . mycelium lettuce survive

; diseased the soil

a

respectively (f) are

Australian

and the - such hundred soil to and Walker, Walker, email:

. . .

brown germination

germinating root, of

and The

under of In

S the

same

multinucleated

sclerotia

of

.

moisture borne ; ; Willetts and Wong (1980) BotanicalReview, 46 (2 ): 101 the are

spp a in symptomatic apothecia

germination, sclerotiorum

as

and

losses lettuce

regular entire progresses

irregular

the

6 brown

soft stem, mat soil

c

th fluorescence .

sclerotia grown . tomatoes,

symptoms

per

is

isolates

contain

Fig largest

lettuce

decay

pathogen, for .

forms

spent

plant on In

from

.

cell

and and use soft sclerotia

are (f)

up S - marie.perrine to in in Corn

333; kindly with , . .

Distribution: biocontrol USA registered based biofumigant with wilted control integrating (APVMA) Pesticides fungicide true by and Fungicides the both All Management options: chickpeas tomatoes, S Host Range: disease southern has Lettuce in soybeans

and Meal white .

MelzerMS

d

lettuce

donated Sclerotinia S

found

commercial minor

leaves) . . fluazinam O:

S been bright young

minor

Agar plants, less mycelium

. However,

on

Heliotiales methods

development minor drop

. .

cooler -

near

. used by

agents [email protected]

for soybeans, and

has Lettuce (CMA)

Coniothyrium

-

. field known fungicide such immediately

Prof In

susceptible and et al subsurface use

occurs lettuce

minor, producing

and

the

are Australia,

on carrots

e - to

more

cultivars regions microscopy

1078; Ian

such plate

were . . (1997) CanadianJournal of Plant

in as

to

an

base treat F: used

drop S

Porter -

in Veterinary

control 265; Grube (2004) Acta

. . ‘Iceberg’

; Australia,

infects iprodione, worldwide peanuts,

.

sclerotiorum applications as

found (b) than

seedling Villalta Australia .

The

-

lettuce of after to drip management Cool . iprodione

minitans

of deep sclerotia Brassica

crops f

the

control respectively

Sclerotinia

90 lettuce closely to lettuce

lettuce irrigation

thinning

and et al

potatoes, plant

be . plowing .

drop Nov 2018

field procymidone, hosts Since Medicines

stage

It with

ineffective .

. . . (2004) Final is biocontrol or wet

lettuce

with . Scale Early

are crops

related ( the is It

Lactuca by

; trials . (at

and

hyphae in

usually weather has

green

1896 (e)

and problematic These

only

susceptible

sunflower the bars Europe is several stages

. prevention

drop

crop

-

multinucleated

the

165

. with species, Contans ,

; roguing

Hortic

Australian registered important represent

S sativa Authority (c)

boscalid

involves manure ability rotation

favours .

caused include

and 4 and minor other other

. to and

®,

at to

of L in in is

(d)

S 5 to in

. .

) .