SCOUT ALL SEASON LONG
Late in the season, Dave Nanda looks at things like plant health, trying to determine if different hybrids have better plant health than others as the season progresses.
SIGN OF THE PEST
Splitting this ear into two pieces turned up a classic tunnel made by a corn borer larva. This hybrid did not have Bt corn borer protection.
You could teach someone how to scout for symptoms of gray leaf spot based on the shape and color of lesions on this leaf, Dave Nanda says.
PROLONGED N DEFICIENCY
This leaf shows signs of nitrogen deficiency. It begins as yellowing down the midrib and eventually can turn the tissue brown.
This wet area of the field lost too much nitrogen. Notice the pale-green color of the stalks, symptoms on leaves and relatively small ears.
Here is a situation you don’t find every day while scouting, Nanda says. This is shot-hole feeding midseason, likely caused by second-generation corn borer.
CLASSIC TIP ABORTION
This plant had big ideas to put on more kernels, but dry weather caused it to abort tip kernels and protect the ones it could finish, Nanda says.