Crop Consulting

  • Bird Cherry Oat Aphids (BCOA)

      Bird Cherry Oat Aphids are starting to reach critical numbers in many fields across the area.  These aphids are piercing, sucking insects that if sufficient in number can cause the plant sufficient stress to reduce yield enough to warrant an insecticide application.  (K-state data suggested a yield reduction of 4-9% before booting. Many economic thresholds suggest 20 or more aphids per stem).  If your field is "honey dewing", becoming greasy, oily, you are probably pas...

  • Freezes and Winter Wheat

    Below is the growth stages and low temperatures and low temperature durations as well as the symptoms that affect winter wheat. These came from both K-State and Texas A&M Growth         Injurious Temperatures                                         &n...

  • Alfalfa Weevil Starting to Hatch

      It looks as if the Alfalfa weevil hatch has begun in north central Oklahoma.  The ones I found today (3/2/16) were very small and buried in the bud (see picture).  At this stage they are not necessarily causing any economic damage but producers should be aware that the hatch has begun and monitor their alfalfa fields in the coming week(s).

  • First Hollow Stem in Grant County

      I have found early (short) first hollow stem on early planted, large, un-grazed, wheat in southern Grant county. (Variety unknown) 2/22/16 Grazing wheat after first hollow stem has been found to be detrimental to the $ bottom line, according to OSU research. I am sure that grazed, later planted, later maturing varieties are not there yet but producers should probably start checking their grazed wheat in the coming week(s) and contemplating removing cattle from acres th...

  • Sugar Cane Aphids and Grain Sorghum

    1/13/2016 Sugar Cane Aphids and Grain Sorghum The middle of January may seem a funny time to be talking about a pest that needs warm (hot) weather to proliferate and do its damage and a crop that won’t be planted for another3 to 4 months. But as has been pointed out to me, many of you maybe booking your seed through this time period.  You may be questioning how many acres worth to buy and if you should buy a “resistant or tolerant” variety. The Sugar Cane Aphid infestation of the summer of ...

  • Might there be Mites? (again)

    Winter grain mites (see picture)  maybe starting to show up in producers’ wheat fields. Dry weather is conducive to their ability to build up a high enough population to damage wheat yields and most of our area (Oklahoma Mesonet) has gone 40 to 70 days without receiving a quarter inch of moisture. I have been hesitant to post about this because the presence of these insects is most often erractic.  One field may have them at a population damaging to wheat and the field next t...

  • Canola: Insects and Glyphosate

    Most of the winter canola I have looked at this fall has the presence of the Diamond Back Larvae.  None to date have had a high enough population to warrant an insecticide alone, but I would add the insecticide to your glyphosate application.  Once the canola leaves start drying down with colder temperatures if the worm starts chewing or damaging the bud, there might be some yield loss. Most acres with canola have an unwanted plant of some type (cheat, rye, rye grass, jointed goat gras...

  • Palmer Amaranths

    Agronomic life as we in north central Oklahoma have known it has shifted… changed, this summer.  Glyphosate resistant Palmer Amaranth pig weeds have popped up all over Garfield, Grant, and Kay counties. In the summer of 2013 we had verified them in two fields within close proximity to one another in Grant County. I knew of none in Garfield.  This year they are spread throughout both counties as well as some in Kay County.  How did they do that, this quickly?

  • Sorghum head worms

      Getting a number of calls about what is probably the corn ear worm, aka the sorghum head worm, aka the soybean pod worm. In the double cropped grain sorghum this worm is in the whorl of the leaves and causing the "shot holing" the producers see as the leaves extend from the whorl.  Usually it is not cost effective to spray for these worms at that time as it takes up to 30% of the leaf area of the plant to be damaged before it starts affecting the yield and it is almost impossible to ...

  • Swathing Canola

    Rarely in our short history of winter canola have I seen straight cutting work out very well for the producer, so even with the short nature in both yield and stature of this canola crop, the fields worth harvesting are still probably worth swathing. By now you may be getting questions or heard discussions on when to start swathing the canola.  The highlights of what goes into that decision are as follows: Canola seeds approach maturity and will complete filling at about 40% moisture and th...

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