nafex@lists.ibiblio.org
Subject: North American Fruit Explorers mailing list at ibiblio
List archive
- From: <dmnorton@royaloakfarmorchard.com>
- To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
- Subject: Re: [NAFEX] tilling for PC control
- Date: Wed, 6 May 2009 18:11:05 -0500
Alan,
There was a study conducted at Michigan State a
while back on the reproductive development of lab-reared PC and field
collected PC to examine the relationship of degree day accumulation and female
reproductive development. The overall goal was to generate an objective
model for predicting damage potential that could be applied to apples rather tan
relying on biofix models. The result was that PC are well adapted to
take advantage of various oviposition resources. Females are able to lay
eggs well in advance fruit set in apples, cherries and plums. According to
the study, this ultimately that protective tactics must be in place
in advance of fruit set. It also meant that
if protection failed by ill timing of controls, PC
populations are virtually guaranteed to be in fruit. This fruit
generally drops beginning with June drop and can continue to
drop throughout the growing season. The study recommended, as
just one of several controls, the removal or mild tillage of dropped
fruit as a post harvest (1300 - 1900 DD) cultural practice to remove any
pupae that might overwinter in the soil.
Since we use a Weed Badger I carried this
recommendation several steps further by simply making sure that our monthly tree
row tillage was carried out in conjunction with June drop as well as a final
post harvest tillage in late fall. We have all of our drops picked up
throughout harvest as a cultural practice, but still use tillage as another step
since we were going to be doing a late tillage for scab to chop up the tree
leaves in the tree rows anyway. A urea spray is recommended by some in
late fall as a step in scab control, but tilling is cheaper and we do the urea
spray in early spring with our foliar program instead. So mild tillage in
late fall can not only benefit a PC program, but scab as well. Just
another tool in the arsenal!
Dennis Norton
Oak Farm Orchard Office (815) 648-4467 Mobile (815) 228-2174 Fax (609) 228-2174 http://www.royaloakfarmorchard.com http://www.theorchardkeeper.blogspot.com http://www.revivalhymn.com
|
-
[NAFEX] tilling for PC control,
Alan Haigh, 05/06/2009
- Re: [NAFEX] tilling for PC control, dmnorton, 05/06/2009
- <Possible follow-up(s)>
- [NAFEX] Tilling for PC control, Jim Fruth, 05/07/2009
Archive powered by MHonArc 2.6.24.