Crop Insurance Today Third Quarter 2020 - 19

TABLE 7

TABLE 8

Corn-Green Snap

Corn-Green Snap

Minnesota-2019

TABLE 9

Corn-Green Snap

Nebraska-2019

Iowa-2019

			Stand Reduction %
		
25	50	75
	 Growth Stage	
Loss%

			Stand Reduction %
		
25	50	75
	 Growth Stage	
Loss%

			Stand Reduction %
		
25	50	75
	 Growth Stage	
Loss%

	
15-Leaf	 9	 19	32
	 11-Leaf Chart	16	31	60

	
15-Leaf	 18	29	40
	 11-Leaf Chart	16	31	60

	
18-Leaf	 9	 17	25
	
Tassel	 7	 16	24
	 15-Leaf Chart	25	50	75

	
18-Leaf	 9	 22	33
	
Tassel	 2	 15	29
	 1-for-1 Chart	25	50	75

	
18-Leaf	 3	 28	35
	
Tassel	 7	 11	31
	
Blister	 10	28	12
	 1-for-1 Chart	25	50	75

the 15-leaf stage. Therefore Table 6 only shows
the results for the other three stages of growth.
The full results are presented in Tables 4, 5 and 6.

CORN Green Snap

Minnesota, Nebraska, Iowa
Green snap is defined in the policy as the

snapping of the main stem "occurring below the
main ear." Previous green snap research evaluated this type of stem break, which resulted in
new procedures to handle this type of loss. Adjusters have requested a procedure that assesses
breaks that occur above the main ear because
current NCIS procedures do not directly address

TABLE 10

Percent Loss of Grain Sorghum
Averaged Across Locations in Kansas (2017-2019) and Texas (2017-2018)
	
Planted Population
	
40,000 Per Acre	
80,000 Per Acre
	
Stand Reduction %
		
25	50	75	90	25	 50	75	90
	 Growth Stage	Loss%

this type of loss. Therefore in 2019, NCIS began
research in Minnesota, Nebraska, and Iowa to
evaluate stem breaks above the main ear that occur at the 15-leaf, 18-leaf, and tassel stages. Due
to wet soil conditions, researchers in Iowa were
unable to apply the stand reduction treatment at
the 15-leaf stage. Therefore Table 6 only shows
the results for the other three stages of growth.
Results are presented in Tables 7, 8 and 9.

GRAIN SORGHUM
Stand Reduction
Kansas, Texas
In 2017, NCIS began grain sorghum stand
reduction trials in Kansas and Texas-the top

	
5-Leaf	 9	 11	28	52	 2	 12	18	36
	 5-Leaf Chart	11.5	28	 56	82.5	11.5	 28	 56	82.5
	
Boot	
5	 29	50	71	 8	 20	52	70
	 Soft Dough	16	41	67	85	15	 44	69	84
	 1-for-1 Chart	25	50	75	90	25	 50	75	90

TABLE 13

Popcorn Average Percent of Loss From Stand Reduction
Compared to the Current Appraised Losses
		
	 Growth Stage	

Applied Stand	
Ears/Plant	
Loss%	
Reduction			

		
		
5-Leaf
	
	
		

Current
Chart Loss

0	
25	
50	
75	

1.1	
0	
0
1.2	
6.3	
5.9
1.3	 25	24.5
1.7	
56.3	
56

		
0	
		
25	
10-Leaf
	
	 50	
		
75	

1.1	
0	
0
1.2	
6.3	
5.9
1.3	 25	24.5
1.7	
56.3	
56

		
0	
		
25	
15-Leaf
	
	 50	
		
75	

1.1	
0	
0
1.3	
15.5	
25
1.6	34.7	50
1.7	
61.6	
75

High levels of stand reduction result in heavy
tillering in grain sorghum. Although tillering
compensates greatly for stand reduction, a
split crop results when stand reduction occurs
after reproduction begins.
CROPINSURANCE TODAY®

19



Crop Insurance Today Third Quarter 2020

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http://www.brightcopy.net/allen/cint/51-02
http://www.brightcopy.net/allen/cint/51-01
http://www.brightcopy.net/allen/cint/50-04
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http://www.brightcopy.net/allen/cint/50-2
http://www.brightcopy.net/allen/cint/50-1
http://www.brightcopy.net/allen/cint/49-4
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http://www.brightcopy.net/allen/cint/may2016
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http://www.brightcopy.net/allen/cint/november2015
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