Crop Insurance Today Third Quarter 2021 - 6

CORN Second Loss
TABLE 5
Minnesota, Illinois, Ohio
In 2018, NCIS began research in Minnesota,
Illinois, and Ohio to evaluate second losses on
corn. Prior research assessed defoliation at the
10- and 15-leaf stages followed by additional
defoliation at either 15-leaf or tassel stage. The
current research focuses on defoliation at the
10- and 15-leaf stages with second defoliations
occurring at the reproductive stages during grain
fill. Research in Minnesota and Ohio was completed
in 2020 and results are presented in Tables
1 and 2. The research in Illinois was damaged by
hail in July 2020 necessitating another year of research
in 2021.
CORN Stand Reduction
Minnesota, Nebraska, Iowa
Research began in 2019 in Minnesota, Nebraska,
and Iowa to continue evaluating stand
reduction losses on corn. Prior research evaluated
stand reduction from the 10- to 17-leaf
growth stages and resulted in the development
of a separate stand reduction chart for the 11to
17-leaf growth stages. The current research
evaluates stand reduction at the 15-leaf, 18-leaf,
and tassel stages to determine whether stand reduction
losses after the 17-leaf stage should be
TABLE 3
Minnesota-2 Year Average
25
50
Growth Stage
15-Leaf
11-Leaf Chart
18-Leaf
Tassel
1-for-1 Chart
TABLE 4
Nebraska-2 Year Average
25
50
Growth Stage
15-Leaf
11-Leaf Chart
18-Leaf
Tassel
1-for-1 Chart
23
16
29
25
25
6 THIRDQUARTER2021
Loss%
37
31
49
41
50
Corn-Stand Reduction
Stand Reduction %
75
63
60
69
71
75
11
16
16
18
25
Loss%
31
31
34
38
50
Corn-Stand Reduction
Stand Reduction %
75
52
60
53
59
75
Corn-Green Snap
Green Snap %
50
75
11-Leaf Chart
18-Leaf
Tassel
15-Leaf Chart
TABLE 6
Corn-Green Snap
Green Snap %
50
75
9
16
12
1-for-1 Chart
11
25
11-Leaf Chart
18-Leaf
Tassel
31
21
24
50
24
60
34
38
75
counted on a 1-for-1 basis. In 2020, treatments
in Iowa were destroyed by the derecho. Results
are presented in Tables 3 and 4.
CORN Green Snap
Minnesota, Nebraska, Iowa
Green snap is defined in the crop insurance
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 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. Treatments in Iowa were delayed due to
wet soil conditions until the 18-leaf, tassel, and
blister stages of growth and in 2020 the Iowa research
was destroyed by the derecho. Results are
presented in Tables 5 and 6.
INDUSTRIAL HEMP
North Dakota
NCIS initiated research in North Dakota in
2018 to study the effects of stand reduction on
seed production in industrial hemp. Industrial
Loss%
23
Nebraska-2 Year Average
25
Growth Stage
15-Leaf
hemp has many different uses including fiber,
seed for vegetable oil production, and production
of cannabinoid (CBD) materials. Hemp research
has recently been allowed again because of
changes that occurred in the 2018 Farm Bill and
the drug's reclassification by the Drug Enforcement
Agency. This research is being conducted
at Langdon and Prosper to study the impact of
stand reduction treatment to a 'dioecious' variety
at three different growth stages. The growth stages
are V3 (three pairs of leaves), V7 (7 pairs of
leaves), and V9 (9 pairs of leaves). Stand reduction
was done at 0, 20, 40, 60, and 80 percent and
the results are shown in Table 7.
INDUSTRIAL HEMP for CBD
Plant Damage
North Dakota, Kentucky
This project will result in research-based loss
instructions for industrial hemp grown for CBD.
When completed, the research will be used to update
the Hemp for Fiber and Seed Loss Instructions
developed in 2019.
The Floral/CBD trial focuses on damage to
the main stem, either by cutting off the terminal
or breaking over the main stem. This was
the most common type of damage observed in
actual hailed fields. The treatments were done at
TABLE 7
Industrial Hemp Response
to Stand Reduction at
Langdon & Prosper
North Dakota-4 Site Average
Stand Reduction %
60
20
Plant Stage
3 Pairs of Leaves
7 Pairs of Leaves
9 Pairs of Leaves
4
6
40
Loss%
-2
7
8
-3
6
16
11
16
25
80
16
12
9
25
31
19
18
50
34
60
25
25
75
10-Leaf popcorn with 75 percent defoliation.
First year results suggest that losses may be
similar to field corn.
9
Loss%
20
Minnesota-2 Year Average
25
Growth Stage
15-Leaf

Crop Insurance Today Third Quarter 2021

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