Island Apple IPM
June 9, 2011: Recorded Apple Pest Message in
Our third and final twilight meeting is June 16 at 5:30 at Highland Farm
635 Highland St.
Holliston, MA 01746
We were there in 2004.
I'm hesitant to give directions - brave your way through Woonsocket or
take 495. Call if you need help - 256-7438.
We are at the end of primary apple scab and if your trees still show
no sign of scab you can relax your fungicide program to applying
Captan every two weeks. You can add Topsin M in every other spray and
when Topsin M is included, make the following spray three weeks later.
If we get more than two inches of rain, consider your pesticides
washed off and that you need to respray.
On the other hand, if you are finding scab, apply full rates of Captan
for at least two consecutive weeks. This hot weather is ideal for
killing scab lesions.
Plum curculio should be all finished migrating into orchards. If you
are in doubt as to whether or not you controlled all the curculio,
scout the border row trees especially along woods. If you do find any
fresh curculio stings, spray insecticide just to the outside two rows.
Attached is a picture of a fresh plum curculio scar I found yesterday.
San Jose scale crawlers are predicted to start crawling on June 13 in
Greenville and June 21 in Newport County. Some orchards have problems
with this insect and should plan on applying an insecticide such as
Centaur, Esteem, or Assail. An insecticide would be applied close to
first crawler emergence and then 7-10 days later. If you don't know
what San Jose scale looks like, see this website:
http://web3.canr.msu.edu/vanburen/sanjosefs.html If you had the
tell-tale red spots on your fruit last year, you will want to apply an
insecticide this year.
Spotted tentiform leafminer/apple blotch leafminer mines have started
to become visible from the upper leaf surface. This insect hasn't been
much of a problem the last several years. If you do find more than one
mine per fruit cluster, consider applying an insecticide against the
next generation of mines. If you want to learn more about apple blotch
leafminers see here: http://web3.canr.msu.edu/vanburen/fstlm.htm If
you do find more than one mine per leaf please give me a call. I'd
like to see how many of the mines are parasitized. If there are enough
parasites, no insecticide is needed.
European red mites can quickly make up for lost time now that warm
weather has arrived. Keep checking on the underside of leaves. It is
best to apply a miticide before mites discolor leaves. The threshold
for mites for June is one mite per leaf. Miticide choices include
Acramite, Kanemite, Nexter, Onager, Zeal and others. See the Tree
Fruit Management Guide - and if you don't have one, I still have more
to sell for $30.