Archive POT-MOD-L: file log9407, part 1/1, size 7241 bytes:
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---------- Forwarded message ----------
Date: Wed, 6 Jul 1994 14:18 CST
From: Chuck Sundermeier - (402) 472-5655 <CSUNDERMEIER@crcvms.unl.edu>
To: jensen@unlinfo.unl.edu, jp@unlinfo.unl.edu, lball@unlinfo.unl.edu,
potmod@beta.tricity.wsu.edu, csmith@crcvms.unl.edu, rfb@unlinfo.unl.edu
Subject: June Listserv Archive
The June Archive for your listserv is now available.
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Chuck Sundermeier University of Nebraska
Internet: csundermeier@crcvms.unl.edu Lincoln, Nebraska
BITNET: csundermeier@unlvax1 (402) 472-5655
Hi Brian,
I circulated your note around the experiment station here. We don't
use as much fungicide as I guess you do in eastern Canada, and
generally only in late summer when the canopy is quite dense. It is
usually applied by airplane or in the irrigation system (we irrigate
continuously), so the constraints are quite different.
Sometimes we try to control late blight by cutting off the water
briefly. Here in the desert there is no rain or morning dew during
mid to late summer so the canopy dries very quickly.
Perhaps try the people at U Maine (Bill Clapham?), Michigan State U,
U Idaho (Gale Kleinkopf). Sorry I can't be more help.
Tom Hodges
Tom Hodges Cropping Systems Modeler ___ ___
USDA-ARS / \_/ \
Rt. 2, Box 2953-A Telephone: 509-786-9207 | |
Prosser, WA 99350 Fax: 509-786-4635 \______/^\/
USA potato tuber
============= thodges@beta.tricity.wsu.edu ========================
...photosynthesis makes the world go around... Mr. Potato Head
On Thu, 30 Jun 1994, Brian N. Craig wrote:
>
> I am developing an expert model to determine the water volumes and field
> sprayer pressure outputs required for different stages of potato crop
> canopy density.
>
> Each potato crop variety will develop significantly different canopy
> densities through the grwoing season. As the crop develops, water
> coverage becomes very critical to ensure fungicides and insecticides
> cover the plant.
>
> Water volume rates for the potato crop will vary from 20 to 40 USgals per
> acre depending on the crop's growth. With heavy canopy growth in the
> later season, the crop here on Prince Edward Island has required 40
> usgals of spray solution delivered at 125 psi to ensure good coverage
> down the bottom of the plant. Varieties such as Kennebec and Green
> Mountain which have dense canopies have been successfully covered with
> protectant fungicides at 125 psi and40 USgals.
>
> What I am looking for are sources of information that have looked at
> fungicide spraying related to potato crop canopy density. Lower volumes
> of spray solution delivered at lower pressures can be used at the
> beginning of a fungicide spray program. Potato producers would like to
> know when to change water rates and pressure rates as the crop grows.
>
> Any information you could provide would be a great help.
>
> Thanks,
>
> Brian Craig
>
> =======================================================================
> | Brian N. Craig | Agricultrue |
> | bncraig@bud.peinet.pe.ca | Pest Management Consultant |
> |---------------------------------------------------------------------|
> | VOICE: (902) 368-5637 | P.O. Box 1083 |
> | FAX: (902) 368-5661 | Cornwall, P.E.I., Canada |
> | | C0A 1H0 |
> -=======================================================================
>
>
---------- Forwarded message ----------
Date: Wed, 27 Jul 1994 20:05:09 -0700 (PDT)
From: Tom Hodges (moderated newsgroup) <sustag@beta.tricity.wsu.edu>
To: ListServ Potato Modelling <potmod@beta.tricity.wsu.edu>
Subject: Position Announcement (fwd)
---------- Forwarded message ----------
Date: Wed, 27 Jul 94 15:17:50 +0100
From: Jonathan Haskett <jhaskett@asrr.arsusda.gov>
To: agmodels-l <agmodels-l@unl.edu>,
Alt Sust Ag List <sustag-public@twosocks.ces.ncsu.edu>,
SANET-MG <sanet-mg@ces.ncsu.edu>, soils-l <soils-l@unl.edu>,
Sust Ag listserve <sustag@beta.tricity.wsu.edu>
Subject: Position Announcement
U.S. Department of Agriculture
Agricultural Research Service
Supervisory Plant Physiologist/Agronomist/Soil Scientist.
ARS has a permanent position in the Systems Research
Laboratory, in Beltsville Maryland. Incumbent provides
research leadership for the development of models,
databases and expert systems; and administrative
leadership for a diverse group of scientists and support
staff. Working knowledge of crop physiology (particularly
whole plant responses to soil and areial environmental
conditions), soils, hydrology.Knowledge in agricultural
systems modeling is required. Ph.D. and research
experience in general agricultural sciences are required.
Grade Range: GS-13/14/15, salary ranging from $49,947.
to $69,427. per annum. For position information,
contact: Dr. Philip C. Kearney, Institute director,
Natural Resources Institute, Beltsville, MD 20705;
or call 301-504-7030; FAX: 301-504-6001.
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