19
F
Scab Cont
r
ol
F
Scab fungicideprogrammes
Scab fungicide p
r
og
r
ammes can be b
r
oken down into: p
r
e-
bud-bu
r
st, bud-bu
r
st to flowe
r
ing, flowe
r
ing to ea
r
ly f
r
uitlet
andp
r
e-
h
a
r
vest. At p
r
e-bud-bu
r
st g
r
owe
r
s could
h
ave used
Cup
r
okylt (MAPP 16944) up to 31 Janua
r
y 2017, but at
p
r
esent no coppe
r
p
r
oduct is aut
h
o
r
ised fo
r
use as a
fungicide, even t
h
oug
h
t
h
eywe
r
e also a ve
r
y impo
r
tant
weapon fo
r
canke
r
cont
r
ol.
At bud-bu
r
st to flowe
r
ing fou
r
main p
r
oducts a
r
e commonly
used: Syllit 400SC, Dit
h
ianonWG/DelanP
r
o, Scala and
Diffe
r
ence. Syllit 400SC (dodine) is an excellent p
r
otectant
and it also
h
as kickback (up to48
h
ou
r
s afte
r
t
h
e sta
r
t of
r
ainfall). It kills bot
h
ascospo
r
es and conidia, is
r
ainfast afte
r
two
h
ou
r
s andpenet
r
ates t
h
e bud/leaf. It can be applied on
wet su
r
faces, t
h
e
r
e is no need fo
r
foliage tobe p
r
esent, it
h
as
excellent efficacy on buds, and t
h
e
r
e is also no loss of efficacy
at low tempe
r
atu
r
es. It
h
as a uniquemode of action and t
h
e
r
e
a
r
e no known
r
esistance issues in t
h
eUK. T
h
e
r
e
h
ave been
conce
r
ns ove
r
t
h
e futu
r
e of Syllit but t
h
e
r
e a
r
e no issues fo
r
t
h
is season andSyllit will continue tobe fully available fo
r
2017.
Fo
r
Dit
h
ianon t
h
e
r
e
h
ave beenmajo
r
c
h
anges in t
h
e last 12
mont
h
s. Dit
h
ianon FL
h
as gone andDit
h
ianonWG
h
as a new
MAPP numbe
r
wit
h
new label
r
ecommendations. Dit
h
ianon
WG now
h
as amaximum
r
ate of 0.5kg/
h
a (five-day
r
ate), six
applications only and a 42-day
h
a
r
vest inte
r
val (hI). BASF
h
as
int
r
oducedDelanP
r
o, w
h
ic
h
isDit
h
ianon co-fo
r
mulatedwit
h
potassiump
h
osp
h
onate. T
h
is is a seven-day p
r
oduct, wit
h
a
maximum of six applications, and a 35-dayhI. It looks good
andpe
r
fo
r
medwell in 2016. G
r
owe
r
s a
r
e
r
est
r
icted to a
maximum annual quantity of 2.1kg/
h
a of Dit
h
ianon
r
ega
r
dless
of w
h
ic
h
p
r
oducts o
r
b
r
ands t
h
ey use.
Compa
r
ingScalawit
h
Diffe
r
encewill
h
elp to c
h
oose t
h
e
r
ig
h
t p
r
oduct fo
r
t
h
e conditions.
Scala is claimed to
h
ave 72
h
ou
r
s of kickback, but you can
get longe
r
at lowe
r
tempe
r
atu
r
es.
Scala
h
as a 56-dayhI, a 10-day
sp
r
ay inte
r
val and
r
equi
r
es a 30m
buffe
r
zone. Diffe
r
encewo
r
ks
best at tempe
r
atu
r
es above 16C,
h
as a 14-dayhI, an eig
h
t-day
sp
r
ay inte
r
val and a 20mbuffe
r
zone.
A
r
ound flowe
r
ing time t
h
e
r
e is
now a long list of fungicides
available to g
r
owe
r
s, including
t
h
eSDhI fungicides (Bellis,
Fontelis, andSe
r
cadis) plus
St
r
oby, Maccani, Scala, and
Switc
h
. Season-long t
r
ials in
Kent andWo
r
ceste
r
s
h
i
r
e in 2016
h
ave
h
elped to info
r
m t
h
e
hutc
h
inson team about w
h
ic
h
option is best to c
h
oose fo
r
individual o
r
c
h
a
r
ds.
Up to 2016, boscalid (Bellis) f
r
omBASFwas t
h
e only SDhI
fungicide in top f
r
uit, t
h
enwe got Fontelis f
r
omDupont in
ThE FrUITGrOWEr •
MArCh 2017
ef
r
uitg
r
owe
r
.co.uk
