Agronomy

2020 Ohio Wheat Performance Test

By: Laura Lindsey and Matthew Hankinson, OSU Extension

Yield results for the 2020 Ohio Wheat Performance Test are online at: https://www.oardc.ohio-state.edu/wheattrials/default.asp?year=2020

The purpose of the Ohio Wheat Performance Test is to evaluate wheat varieties, blends, brands, and breeding lines for yield, grain quality, and other important performance characteristics. This information gives wheat producers comparative information for selecting the varieties best suited for their production system and market. Varieties differ in yield potential, winter hardiness, maturity, standability, disease and insect resistance, and other agronomic characteristics. Selection should be based on performance from multiple test sites and years.

In fall 2019, wheat was planted at four out of the five locations within 10 days of the fly-free date. Due to poor soil conditions, wheat was planted in Wood County 21 days after the fly-free date; however, wheat grain yield averaged 99.5 bu/acre at that location. Wheat entered dormancy in good to excellent condition. Early season wheat growth and development were slower than previous years due to cool temperatures and above average precipitation. Harvest conditions were favorable and harvest dates average. Results from Union County were not included in this report due to extreme field variability caused by high rainfall. Overall, grain test weight averaged 58.8 lb/bu (compared to an average test weight of 55.0 lb/bu in 2019). Across the Wood, Wayne, Darke, and Pickaway locations, grain yield averaged 93.8 bu/acre.

Leafhoppers, Grasshoppers, and Beetles, Oh My!

By: Kelley Tilmon and Andy Michel, OSU Extension

As the summer progresses we are receiving reports of insect problems often encouraged by hot, dry weather.  Last week we reported on spider mites and especially if you are in an area of continued dry weather we recommend scouting your soybeans and corn  https://agcrops.osu.edu/newsletter/corn-newsletter/2020-22/watch-spider-mites-dry-areas .

Some areas are also reporting increases in young grasshoppers in soybeans, another insect favored by dry weather.  Grasshoppers of often start on field edges so early scouting may allow for an edge treatment.  Japanese beetles are another common defoliator of soybean that are starting to appear.  Both of these pests fall into a general defoliation measurement, and we recommend treatment if defoliation is approaching 20% on the majority of plants in post-flowering beans.  Download our guide to estimating defoliation in soybean at https://aginsects.osu.edu/sites/aginsects/files/imce/Leaf%20Defoliators%20PDF_0.pd Continue reading Leafhoppers, Grasshoppers, and Beetles, Oh My! →

Revisiting Corn Use for Ethanol

By: Todd Hubbs, Department of Agricultural and Consumer Economics, University of Illinois.  farmdoc daily (10):133

Stronger export numbers and lower acreage boosted corn prices since the end of June.  Concerns about demand weakness in ethanol production emerged recently.  A recovery in economic activity helped ethanol plants ramp up production as gasoline demand increased.  A resurgence in virus incidences threatens ethanol production over the short run and injects uncertainty into long-run prospects.

Gasoline demand recovered to almost 89 percent of pre-coronavirus lockdown levels in early July.  Despite this positive development, the recovery in demand flattened out over the last few weeks.  Gasoline stocks began to recede but still sit substantially above levels seen at this time of the year.  Attempts to reopen the economy hit a snag as the virus spread rapidly around the country after initial hopes saw a rapid opening in many areas.  At 8.648 million barrels per day, demand recovered substantially from the low point of 5.311 million barrels per day seen in early April.  The path back to normal gasoline demand levels appears stalled.  Ethanol production followed this recovery and will feel the implications of flattening gasoline use. Continue reading Revisiting Corn Use for Ethanol →

Watch for Spider Mites in Dry Areas

Spider mite stippling damage in soybean (bugwood.org)

By: Andy Michel and Kelley Tilmon, OSU Extension

Hot, dry weather encourages certain pests in field crops, in particular spider mites in soybean and occasionally corn.  Spider mites are a sporadic problem that most often occurs in August, but infestations in July are possible with sustained periods of hot, dry weather like some parts of Ohio are experiencing.  Crop scouts in areas that have not received rain recently should be on the lookout for this problem; spider mites are easy to miss in early stages and can build quickly.

Look for light-colored stippling damage which is easier to spot than the mites themselves.  In areas with heavy stippling you can confirm the presence of mites by tapping vegetation over a black piece of construction paper.  [Many sources will say to use white paper; but insider tip:  they are actually easier to see against a dark background].  The mites will look like specks of dust that move.

Stippling is common in the lower canopy even in non-outbreak situations.  When the stippling extends up into the middle canopy and is common, treatment is recommended.  We do not recommend edge treatments for this particular pest.  Make the decision for the whole field.  Most pyrethroid products with the exception of bifenthrin are not effective against spider mites and may even flare them.  Lorsban and generics have been popular choices against mites but may be less available now.  Check the field five days after application for resurgence because these products do not kill mite eggs.

There are specific miticide products that are particularly effective because they also kill mite eggs, eliminating the next generation.  Two such products are abamectin (Agri-Mek SC), labeled for use on soybeans, and etoxazole (Zeal), labeled for use on corn and soybeans.

A resurgence of moisture will go a long way to reducing spider mite populations.  Mites are particularly susceptible to fungal insect/mite killing pathogens which are favored by moist conditions (one of the reasons dry weather encourages mite outbreaks).

 

 

 

Drought Projections Do Not Go Well With Fungicide Applications

By: Anne Dorrance and Pierce Paul, OSU Extension

Several calls this past week for fungicide applications on corn and soybean at all different growth stages.  So let’s review what might be at stake here.

Soybeans.  Frogeye leaf spot and white mold on susceptible varieties when the environment is favorable for disease easily pay the cost of application plus save yield losses.  Let’s dig a bit deeper.  Both of these diseases are caused by fungi but frogeye leaf spot is a polycyclic disease, meaning that multiple infections occur on new leaves through the season while white mold is monocyclic and the plant is really only susceptible during the flowering stage.  Both of these diseases are also limited geographically in the state.  White mold is favored in North East Ohio and down through the central region where fields are smaller and air flow can be an issue.  Frogeye has been found on highly susceptible varieties south of 70, but it is moving a bit north so it is one that I am watching. Continue reading Drought Projections Do Not Go Well With Fungicide Applications →

Corn Growth in Hot and Dry Conditions

By: Alex Lindsey and Peter Thomison, OSU Extension

In recent days we have been experiencing 90 degree F days with limited precipitation, and so we are starting to see some leaf rolling in corn. Some of this may be related to reductions in soil moisture, but may be related to restricted root systems as well. Depending on the stage of corn at the time of these conditions, different effects on yield may be expected. Corn ear development occurs throughout the growing season, and extreme temperature or moisture stress at different growth stages will decrease different aspects of grain yield. Below is a quick summary of the yield component most affected by environmental stress at different growth stages: Continue reading Corn Growth in Hot and Dry Conditions →

Double Crop Soybean Recommendations

By: Laura Lindsey, OSU Extension

As small grains are harvested across the state, here are some management considerations for double-crop soybean production:

Relative Maturity. Relative maturity (RM) has little effect on yield when soybeans are planted during the first three weeks of May. However, the effect of RM can be larger for late planting. When planting soybean late, the latest maturing variety that will reach physiological maturity before the first killing frost is recommended (Table 1). This is to allow the soybean plants to grow vegetatively as long as possible to produce nodes where pods can form before vegetative growth is slowed due to flowering and pod formation.

Table 1. Recommended relative maturity (RM) ranges for soybean varieties planted in June and July in northern, central, and southern Ohio. Continue reading Double Crop Soybean Recommendations →

Corn and Soybeans Emerged, Wheat Makes Progress

Source: Ohio Ag Net

Rainfall increased throughout the state at an opportune time, causing soil moisture to improve, according to Cheryl Turner, State Statistician, USDA NASS, Ohio Field Office. While precipitation increased overall, dry weather continued in a few areas of the state. Topsoil moisture, however, increased from 53 percent adequate or surplus last week to 69 percent adequate or surplus this week. Average temperatures for the week were approximately 1 degree above historical normals, and the entire state averaged just over 1 inch of precipitation. There were 5.2 days suitable for fieldwork during the week ending June 28. During the week, farmers side dressed nitrogen on corn and applied herbicides to corn and soybeans. Winter wheat continued to mature while reporters continued to anticipate the start of harvest. Soybean planting progress reached 100 percent, ahead of the five-year average by 5 percentage points, while soybeans blooming was 11 percent. Corn emerged progress was 100 percent, 4 percentage points ahead of the five-year average. Sixty-three percent of corn was considered good or excellent and 74 percent of pasture and range was considered good or excellent compared to 38 percent the previous year.

ODA Partners with Extension to Provide Online Pesticide Recertification

During the COVID-19 Pandemic, the Ohio Department of Agriculture (ODA), is partnering with the Ohio State University Extension Pesticide Safety Education Program (PSEP) to temporarily provide online recertification for pesticide applicators and fertilizer certificate holders whose licenses expired in spring of 2020. The online recertification will be available Monday, July 6. For commercial applicators, it will be available Aug. 10. For more information or to register for the online recertification, visit pested.osu.edu/onlinerecert. Continue reading ODA Partners with Extension to Provide Online Pesticide Recertification →

Use 2020 Tri-State Fertilizer Recommendations

The Tri-State Fertilizer Recommendations provide the foundation for agronomic nutrient management recommendations from the land-grant universities in Ohio, Michigan and Indiana. The original publication, which came out in 1995, has been comprehensively updated with the release of the 2020 Tri-State Fertilizer Recommendations for Corn, Soybean, Wheat and Alfalfa.

The publication relies on Ohio-generated data from 198 farmer-coordinated, on-farm trials in 39 Ohio counties and long-term plots at OARDC Ohio Agricultural Research and Development Center Agronomic Research Stations conducted from 2006-18. This data validates the recommendations against modern hybrids and varieties and agronomic management practices under current weather conditions. Key recommendations from the guide are included here. Continue reading Use 2020 Tri-State Fertilizer Recommendations →