2017 Corn Plot at Mynard, Spring Corn Insect Pressure  04/13/17 10:03:27 AM

HAPPY EASTER!!!  From all of us at WBI

 

I KNOW that it is mid April and planting has just begun for most people.  So, plot tours are something not on many people’s minds yet.  However, I do want to share with you what we were able to plant this past Monday the 10th, in the plot are West of Mynard.  YES it is early, but that is by design.  Remember what I always say regarding genetic plot work.  It is better to have as much diversity regarding, planting date, population, fertility, soil type, etc. when looking at the potential of new and old genetics. 

 

2017 Mynard Corn Plot Layout

       
         

2017 Starter Trial

       

Planted East to West after Corn and Soybean Break

       

Planted on 4/10/2017

       

DKC70-27

       
         

Treatment

       

First 12 rows--Untreated check

       
         

1. 5 gal of Optistart Pro--9-18-6-2Sulfur 0.5 Zn-0.05 MNw Avail

2.  5 gal of Optistart Pro--9-18-6-2Sulfur 0.5 Zn-0.05 MNw Avail + 3.4 oz of Capture LFR

3. 5 gal of Optistart Pro--9-18-6-2Sulfur 0.5 Zn-0.05 MNw Avail + 3.4 oz of Capture LFR  + 3.6 oz. of Xanthion.

4.  5 gal of Optistart Pro--9-18-6-2Sulfur 0.5 Zn-0.05 MNw Avail + 3.4 oz of Capture LFR + 10 oz of Optify Stretch

         

Last 12 rows--Untreated Check

       
         

32K Population, 2.25” deep  soil temp at 4” was 39 degrees

       
         

MD Trial--Planted 4/10/2017--32K

       

4 rows each

       

16 entires of the MD plot

       

DEKALB DKC60-89

       

DEKALB DKC60-88

       

DEKALB DKC62-52

       

PIONEER 1197

       

DKELAB DKC63-21

       

DEKALB DKC64-35

       

DEKALB DKC65-81

       

DEKALB DKC65-94

       

DEKALB DKC66-75

       

PIONEER 1751

       

DEKALB DKC68-26

       

DEKALB DKC70-27

       

PIONERR 1751

       

DEKALB DKC64-35

       

PIONEER  1197

       

DEKALB DKC60-88

       
         

SPEED TRIALS

       

16 ROWS OF DKC52-61 AT 5 MPH with 1790

       

16 ROWS OF DKC52-61 AT 8 MPH with 1795 Exact emerge planter

       
         

STARTER TRIALS WITH 1790 PLANTERS

       

16 ROWS OF DKC52-61 WITH OPTISTART, XANTHION, CAPTURE LFR

       

16 ROWS OF DKC52-61 WITH NO STARTER

       

  

Our plan is to have a total of 12 sets of the genetic trials. As I am writing this on Wednesday (4/12), our 4th plot is in the process of being planted ahead of forecasted rain.  So, we will have a decent look at the newer genetics and how they react to early planting in a cooler and wet environment.

As always, we will start the summer tour sometime in May after the planting season winds down a bit.  RAIN OR SHINE—If raining--we will gather in our seed building—If the sun is shining--at our plot on the West side of Mynard Nebraska—1 mile South of our plant—1/4 west on Mynard Road OR 1-1/4 mile West of HWY 75 on Mynard Road—South Side of the Road.   The tours would last no longer than 1.5 hours and address any current agronomic issues as well as allow the attendees to monitor developmental progress of Asgrow and DeKalb genetics throughout the growing season. 

WE LOOK FORWARD TO SEEING YOU THIS SUMMER!

 

 

 

The weather pattern this spring is ideal for insect pressures from Wireworm, Black Cutworm and White Grub to develop. 

These insects and the amount of them should not be surprise given last year’s infestations as well as the mild winter conditions which increased the amount of eggs that survived the winter.  The weather pattern this spring has had a number of days of warm weather followed by cool/damp conditions.   The warm weather has forced the eggs of many insects to hatch earlier than normal.  The bad news is that if an insecticide treatment is not made  as an in-furrow application at planting, feeding can/will occur and there is not much recourse from a insecticide application-The insecticide must get into the germination zone to have much affect.  The corn seed treatment Poncho 250, which is widely used in many hybrid corn offerings, is designed to provide control of a host of secondary soil insect pests such as Black Cutworm, Wireworm, and White grubs among others. 

 

 

Consider this when planting this spring:

 

Black Cutworms

Black cutworms do not over-winter in Nebraska, so southerly winds bring them to our state.  They are most likely to damage corn, which has been planted into sod, pasture, alfalfa, soybeans or small grains. Conditions which favor infestation include 1) corn following soybeans that had an abundance of winter annual and perennial weeds, 2) fields with heavy vegetation, 3) fields planted into sod or legume pastures, 4) fields on low or bottom land and fields planted using no-tillage.  Moths, which fly in, need residue or green vegetation in order to lay their eggs and weedy fields, have the highest risk for egg laying and when these conditions are present, the chances of infestation increase. 

Wireworms

Wireworms over winter here and are among the most difficult insects to control and may be very destructive by feeding on both the seeds and seedling corn plants.  Wireworm larvae can live between 2 to 6 years prior to completing their life cycles feeding primarily on roots. Damage is generally worse the first and second year after a sod or forage crop.

WHITE GRUBS over winter here and have a longer life cycle than most root-feeding corn insects (1 to 4 years dependent on species).  Larvae can grow to one inch long, are creamy white with a brown head.  White Grubs larvae can feed on corn roots for as long as three years.  They will sever the root system, and the plant will die once it cannot compensate for the root loss.  White Grubs can be found in most any field or soil for that matter. 

Many producers can manage these insects through waiting just a few more days to plant corn allowing the warmer weather to germinate and emerge the corn plant in a quick manner. This decreases the chances of seed feeding insects to have an opportunity to cause economic injury.

 

 

 

John W. McNamara

Agronomist

Wiles Bros. Inc.

606 Wiles Road

Plattsmouth NE. 68048

(402) 298-8550--Office

(402) 499-3870--Cell

(402) 298-7174--Fax

 
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