19
F
Tec
h
nical Semina
r
F
a
r
emo
r
ematu
r
e, t
h
e
y
will mig
r
ate toot
h
e
r
f
r
uitlets in t
h
e same
cluste
r
. It’s not like codling in t
h
e sense t
h
at it
r
uins t
h
at f
r
uitlet
– it
r
uins t
h
ew
h
ole cluste
r
.” Paul t
h
e
r
efo
r
e advised g
r
owe
r
s to
monito
r
fo
r
t
h
e pest
by
usingw
h
ite stick
y
t
r
aps du
r
ing t
h
e
b
loompe
r
iod followed
by
an insecticide t
r
eatment if necessa
ry
.
Apple (pear) budweevil
Apple
b
udweevil (
Anthonomus piri
) – app
r
op
r
iatel
y
r
efe
rr
ed
to
by
t
h
e indust
ry
as t
h
e pea
r b
udweevil – is anot
h
e
r
insect
t
h
at
h
as
b
ecomemo
r
e of a p
r
o
b
lem and, unfo
r
tunatel
y
, it can
cause significant
y
ield losses in pea
r
c
r
ops.
D
r
Mic
h
elle Fountain, an entomologist at NIAbEMr, noted
t
h
at t
h
e d
r
op in
br
oad spect
r
um insecticide use
h
as caused a
r
etu
r
n of t
h
is pa
r
ticula
r
weevil. “Essentiall
y
we
r
emoved t
h
e use
of
br
oad spect
r
um insecticides in pea
r
o
r
c
h
a
r
ds
b
ecause pea
r
sucke
r
is now
r
esistant.We know t
h
at ea
r
wigs and
ant
h
oco
r
ids a
r
e ve
ry
impo
r
tant fo
r
t
h
e cont
r
ol of pea
r
sucke
r
.
So, we don’t want to kill off t
h
ese lovel
y
p
r
edato
r
swit
h
t
h
e use
of
br
oad spect
r
um insecticides.”
Mic
h
elle
r
evealed t
h
at s
h
e
h
as ca
rr
ied out some unfunded
wo
r
k to t
ry
and lea
r
nmo
r
e a
b
out t
h
e
b
iolog
y
of t
h
is pest afte
r
pea
r
g
r
owe
r
s sta
r
ted to complain a
b
out it. S
h
e said t
h
at, w
h
ilst
t
h
e
r
e is still muc
h
mo
r
e t
h
at needs to
b
e lea
r
ned a
b
out t
h
e
weevil’s lifec
y
cle, t
r
ials at EastMalling
h
ave so fa
r
s
h
own some
useful
r
esults. Fo
r
instance, t
r
ials in
b
ot
h
t
h
e la
b
o
r
ato
ry
and t
h
e
field
r
evealed t
h
at Cal
y
pso gives effective cont
r
ol of t
h
e pest,
wit
h
la
b
o
r
ato
ry
r
esults s
h
owing t
h
at t
h
e p
r
oduct gives up to
90% efficac
y
. Mo
r
eove
r
, followingo
r
c
h
a
r
d inspections, Mic
h
elle
lea
r
ned t
h
at t
h
e pea
r b
udweevil, w
h
ic
h b
ot
h
feeds on and la
y
s
eggs in t
h
e flowe
r b
ud, is active at nig
h
t and tends tomate in
t
h
ewa
r
me
r
evenings in t
h
e sp
r
ing. S
h
e said: “T
h
is sp
r
ing
activit
y
is quite impo
r
tant
b
ecause t
h
e
r
e a
r
e fewe
r
p
r
edato
r
s in
t
h
e sp
r
ing t
h
an t
h
e
r
e a
r
e in t
h
e autumn a
r
ound
h
a
r
vest. So, if
we can t
r
eat [t
h
is pest] in t
h
e sp
r
ing
r
at
h
e
r
t
h
an t
h
e autumn
t
h
ismig
h
t
b
e a
b
ette
r
time, t
h
us avoidingdamaging ou
r
natu
r
al
enemies.”
In addition to t
h
e pea
r b
udweevil, apple sawfl
y
and
leaf
h
oppe
r
,
seve
r
al mot
h
s a
r
e
alsomaking a
r
eappea
r
ance,
explainedbASF’s
Simon Townsend.
he said:
“G
r
owe
r
s need to
b
ea
r
inmind t
h
at
we a
r
e in a
c
h
angingwo
r
ld –
awo
r
ldwit
h
out
c
h
lo
r
p
yr
ifos.We
don’t
h
ave t
h
e
use of
br
oad
spect
r
um
insecticides now,
and I t
h
ink t
h
at,
as time goes on,
wema
y
well
expect newpest
species to
eme
r
ge and t
h
e
y
need to
b
e cont
r
olledwit
h
app
r
op
r
iate
measu
r
es. In someUK t
r
ialswe
h
ave encounte
r
ed a
r
esu
r
gence of mot
h
pests t
h
at
h
ave not p
r
eviousl
y b
een a
p
r
o
b
lem, suc
h
asblasto
b
asis.” he added: “If blasto
b
asis
h
as
b
een found at all in t
h
e p
r
evious season use an insecticide
timed to cont
r
ol it in t
h
e su
b
sequent season.”
◆
ThE FrUITGrOWEr •
FEbrUAry 2017
ef
r
uitg
r
owe
r
.co.uk
