Archive for the ‘Crop/Pest Observations-2012’ Category

Feb
25

2012 County Corn and Soybean Yields Released

The USDA, National Ag Statistics Service has released the 2012 Ohio corn and soybean yields per acre. These yields are used for some crop insurance triggers and helpful in tracking weather impacts. Data for all counties in Ohio can be found at: http://www.nass.usda.gov/Statistics_by_State/Ohio/index.asp

2012 County Yields – NASS, OH Field Office

County

Corn

Soybean

Williams

98.6

39.9

Fulton

121.4

47.5

Lucas

145.3

52.4

Defiance

82.3

34.6

Henry

101.1

49.9

Wood

136.5

53.6

Paulding

91.7

40.7

Putnam

116.9

48.6

Hancock

144.0

49.8

Van Wert

122.5

55.3

Allen

113.9

53.3

Ohio

123.0

45.0

Jul
2

Is the Pump Primed for Spider Mites in Soybeans?

by: Bruce Clevenger

Adult twospotted spider mites (TSSM) are very small (ca. 1/60 inch in length), eight-legged arthropods (nymphs have 6 legs) with a black spot on each side of their bodies. Color of the mites is variable ranging from white to light red. The eggs of the mites appear like small, clear or pale marbles when viewed through a good hand lens. TSSM feed on the underside of the foliage with sucking moth parts and may be very destructive when abundant. Under hot and dry field conditions favorable to mites, the TSSM thrives on plants that are under stress. The juices that the mites obtain from stressed plants are rich in nutrients and the mites multiply rapidly. Soybean foliage infested with spider mites initially exhibits a speckled appearance. As plants become heavily infested, foliage turns yellow, then bronze, and finally the leaves drop off the plants as the effect of heavy feeding leads to dehydration and death of the plant.  As of July 2, 2012, TSSM have not been seen in abundance across NW Ohio in field edges or whole fields.

Economic thresholds based on the number of mites per plant have not been established for TSSM on soybeans. However, a scheme for evaluating an infested field based on observations of the presence of mite and feeding injury has been developed.  Close monitoring of individual fields will be critical during the next few weeks.  Don’t assume one field represents a greater area or all of a growers soybean production.  Populations of TSSM may begin spotting and require follow-up scouting.

Scouting procedures can be found at: http://ohioline.osu.edu/ent-fact/pdf/0024.pdf

Pesticide recommendations: http://entomology.osu.edu/ag/images/545%281%29.pdf

Jun
29

Indiana Drought Impacting Northwest Ohio

 

By Bruce Clevenger

While most of Ohio is dry, NW Ohio is in a drought.  Defiance County is taking the brunt with plenty of pain being felt by neighboring counties.  The most recent rain fell around Defiance County on June 21 with scattered amounts of 0.1 inch to 1.5 inch plus.  My corn and soybean research plots located near the Defiance County Airport planted April 25 and May 11 respectively, received 0.8″ but no substantial stress relief is observed.  High temperatures are adding to crop stress as Defiance, OH temperatures reached 107 degrees Fahrenheit on June 28 with much of the same in the forecast through mid-July.

Track the drought during 2012 at: http://droughtmonitor.unl.edu/