2023 eFields Report

Page 168

Cereal Leaf Beetle on Organic Cereal OBJECTIVE

eFields Collaborating Farm

Assess differences in cereal leaf beetle larval presence and feeding damage across varieties of organic small grain forages, including barley, oats, and triticale.

Planting Date 4/20/2023 Harvest Date 6/28/2023 Variety Multiple Population 100 lbs/ac Acres 1 Treatments 11

Wayne County

WEATHER INFORMATION MAX. AND MIN. TEMPERATURE (°F)

STUDY INFORMATION

OSU Extension

Management Fertilizer Previous Crop Corn Row Spacing 7.5 in. Soil Type Wooster-Riddles Silt Loams, 51% Canfield Silt Loam, 49%

DAILY PRECIPITATION (IN)

Tillage Conventional

Planting Date

Harvest Date

90 80 70 60 50 40 30 20 10 0

Reps 4 Treatment Width 10 ft.

100

3

2

1

0

Growing Season Weather Summary APR

MAY

JUN

JUL

AUG

SEP

Total

Precip (in.)

2.79

2.55

3.53

5.80

5.42

0.72

20.81

Cumulative GDDs

187

547

1049

1743

2327

2769

2769

STUDY DESIGN This study was a randomized complete block design with 4 replicates and 11 treatments. Each plot was 10 feet wide x 40 feet long with 7.5 inch rows drilled. On June 9, ten plants from each plot were randomly selected, and the tallest leaf was identified and cut from the base of each plant. Height (cm), cereal leaf beetle larvae number, and damage ratings were collected for each of the ten stems. Damage was a visual rating on a scale of 1-5 (1 = less than 10%, 2 = 11 to 25%, 3 = 26 to 50%, 4 = 51 to 75%, 5 = more than 76%). The center 4 feet were harvested from each plot and dry matter yield was calculated in tons/ac.

168 | Ohio State Digital Ag Program

Cereal leaf beetle larvae under a microscope.


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