VegNet Vol.
11, No. 13.
On the WEB at: http://vegnet.osu.edu
In This Issue
1. Phytophthora Blight on Tomatoes
2. Crop
Report
3. Vegetable Calendar
4. Farm Focus
5. The 10 Day Outlook
Phytophthora Blight on Tomatoes From: Mac Riedel and Nancy Taylor
Trellised fresh market tomatoes from Wayne and Meigs
Co. have developed >soft, brown lesions on the upper portions of stems. When
cut, stems show extensive rotting of the pith well beyond the borders of the
stem lesion. Phytophthora capsici,
the causal agent of Phytophthora Blight, has been
cultured from these tomatoes.
In general, this fungus has not been serious on tomatoes. It
commonly causes Buckeye Rot on the fruit, but it usually has
not caused stem or leaf lesions. The weather has been exceptionally favorable
for development of this disease. The fungus requires warm temperatures and
abundant soil moist. Frequent rains which cause a few hours of flooding also
favor disease development. Heavy rains can splash soil with the fungus onto the
upper parts of the plants, also.
At this time, control will require use of fungicides. Ridomil Gold is effective, but the long PHI periods of Ridomil Gold/Bravo mixes probably not be
compatible with harvest schedules now. Amistar (1 day
PHI), Tanos (3 day PHI) or Gavel (5 day PHI) may be
better choices.
Because of the disease development on tomatoes, a relatively
resistant host, growers should be examining more susceptible crops such as vine
crops and peppers for development of this disease. Review information on this
disease at:
http://ohioline.osu.edu/hyg-fact/3000/3116.html
Crop
Report (Hal Kneen)
Weather has been on most growers' minds. Too dry says the sweet corn
grower as he irrigates his silking fields this past
week. Picking bare ground Temptation corn, Seneca Daybreak already completed.
Tomato growers like the dry weather. Most are irrigating their fields especially later bearing tomatoes. Sunbright, PicRed, Sunsation, varieties are being harvested. Specialty
tomatoes (cherry, grape, roma, saladette,
yellow, beefstake, Mr. Stripey)
are being picked by some growers while others will be two - three weeks away
from picking.
Bell peppers, cucumbers, squash,
Bare ground muskmelons and watermelon for local vendors will be
ready in about two weeks.
Weak insect (European Corn Borer, Corn earworm)
pressure on sweet corn. Bacterial speck and Phytophphora on tomatoes. (see
Vegetable
Calendar
July 29 Muck
Crops Agr. Research Station Field Day, 4875 St. Rt.
103 South
August 4,
The Walking the Fields tour.
This tour as in the past will be held just prior to the Station Field
day from
August 4, Vegetable Crops
Field Day , 3:30 - 6:00 PM, OARDC's North Central
Agricultural Research Station (formerly named: OARDC Vegetable Crops Branch). located at 1165 C.R 43
August
12, Pumpkin Field Day, 4 to 6 PM,
Western Agricultural Research Station, S. Charleston.
Pumpkin Research topics: Strategy and Sandea
herbicide in no-till with rye cover; Admire label issues / discussion; Seed
specific banding of insecticide research using pumpkins, zucchini’s, and cucumbers;
Pumpkin variety plots; Fungicide plots; Pumpkin catapult?
Want PAT & CCA credits? $15 per person; General admission: $5 per person
OSU Researchers Present: Matt Darr, Reza
Ehsani, Jim Jasinski, Erdal Ozkan, Bob Precheur, Mac Riedel, Matt Sullivan & Celeste Welty
Need more information? Contact Jim Jasinski
at 937-484-1526, jasinski.4@osu.edu, or 937-239-6850.
Farm
Focus 2004 (From: Dusty Sonnenberg, email:
sonnenberg2@postoffice.ag.ohio-state.edu)
The 30th Annual Farm Focus will take place on Friday,
July 30th from 8-5, and Saturday, July 31st from 8-4 at
the Marsh Foundation School Farm. The
site is located at in intersection of U.S. 30 and U.S. 127 in Van Wert. Farm Focus features 15 acres of Agricultural
and Horticultural Exhibits, Wagon Tours of Research Plots, Farm Equipment
Demonstrations including GPS Technology, an Antique Tractor Pull and much
more. The OSU Extension Vegetable Crops
Team will also have a display. For more
information abut Farm Focus call (419) 238-1214, or visit them on the web at www.farmfocusshow.com
The 10
Day Outlook
Temperature: From July 8 to July 13, the mean surface
temperature for most of OH except the northeast counties will be between 70 to
80 degrees F. The mean surface temperature in these northeastern counties will
be between 60 to 70 degrees.
From July 13 to July 18, the mean surface temperature for all of
OH will be between 70 to 80 degrees F.
Precipitation: From July 8 to July 13, There are chances to receive 0.5 to 1 inch of rain with
extreme northwest OH receiving more rain.
From July 13 to July 18, most of OH will see 0.5 inches or less.
Consult the “Weather Links” portion of the VegNet
Website and scroll down to the National Weather Service office locations for
your part of