Week of July 21 – 25 Scouting Report Summary


  • Corn: Scouted fields ranged from v9 to R1.  Grey leafspot continues to develop in susceptible varieties.  Scouts reported anywhere from low levels of gray leaf spot to 95% of plants displaying grey leaf spot symptoms.  Fall armyworm, Japanese beetles and grasshoppers all reported as causing light defoliation .  Three Western bean cutworm moths were captured in 1 of 2 trapping locations.  Deer damage was noted in some scouting reports.
  • Soybeans:  Scouted soybeans ranged from V7 to R2 stage of development.  Japanese beetle and grasshopper feeding damage were found at low levels in most fields.   Ground hog damage is being noted.

Week of July 21 – 25 Scouting Report Summary


  • Cole crops: Cabbage, Cauliflower and Broccoli:  Young fall harvest plantings have some light levels of flea beetles and cabbage worm damage.  More serious is the damage being done by deer and ground hogs feeding on the plants.
  • Onions: Many plantings are being harvested.
  • High tunnel tomatoes: Early blight continues to progress in many high tunnels, growers are encouraged to maintain a regular and consistent spray program.   Timber rot continues to be found.  Yellow shoulder, blossom end rot and zippering, primarily abiotic conditions are also being noted by scouts.  Damage by tomato hornworm, tomato fruitworm and variegated climbing cutworm were all found by scouts this week.  In one high tunnel tomato fruitworm damage to tomato fruit was above treatment threshold level.
  • Field tomatoes:  Bacterial speck, spot and canker all being found on plants.  This week scouts continued to report fruit as well as foliage with bacterial speck and spot.  Early blight and septoria leaf spot incidence is increasing.  Blossom end-rot, zippering and catfacing are also being found.   Damage by variegated climbing cutworms was noted.  In something a bit out of the ordinary, scouts noted some heavy feeding by Colorado potato beetle on some young tomato transplants.
  • Sweet corn: Development stages range from some v3 for late planted corn to harvest on some plantings. Trap counts for corn earworm moths remained at zero.  Corn borer moths were caught in a couple of locations, possibly indicating the start of another generational flight.  For a second week scouts found western bean cutworm moths at low levels in a pheromone trap.   No brown marmorated stink bugs have been found in traps.
  • Cucumbers:  Harvest is under way in some plantings and there have been some plantings made for intended fall harvest.  Cucumber beetles were reported at below threshold levels this week.  Angular leaf spot, a bacterial disease, is common in many plantings.  Other diseases noted include anthracnose and phytophthora blight.
  • Zucchini and Summer Squash:  Squash bug adults and eggs can be seen in some fields at low levels. Cucumber beetles and Japanese beetles were found, but again, at low levels.  Angular leaf spot is common and powdery mildew incidence is increasing.   Bacterial wilt and anthracnose are present in some plantings.  Blossom end rot was noted.
  • Winter Squash and Pumpkins:  Japanese beetles and grasshoppers at mainly low levels were noted by scouts.  Grasshoppers were heavier in grassy areas of the field.  Angular leaf spot, anthracnose and powdery mildew are present in many plantings.  Scouts noted feeding damage by deer and groundhogs.
  • Melons: Anthracnose and bacterial wilt have been found.  Angular leaf spot has also been detected by scouts and confirmed with lab diagnosis.
  • Potatoes:  Some early harvest of potatoes has started.  Colorado potato beetles (CPB) were causing heavy defoliation in some plantings.  Potato leaf hoppers were at low levels.
  • Peppers:  Bacterial spot continues to develop.  Anthracnose was also found in some plantings along with cercospora leaf spot.  Blossom end rot can also be found.
  • Eggplant: CPB, and Japanese beetles are commonly found on eggplant.  Some plantings exhibited heavy defoliation damage due to CPB feeding.  Anthracnose was found on some plants.
  • Green/Snap Beans:  Beans generally look very good.  Bean leaf beetles, potato leaf hopper, grasshoppers and Japanese beetle levels were all reported as light.

Week of July 21 – 25 Scouting Report Summary


  • Apples: Fruit is developing.  Some codling moth larvae were found in some fruit this week.  Aphids and red mites remained at low levels.  There was a small increase in codling moths caught in pheromone traps.  Apple maggot trap numbers remain at 0.
  • Grapes:  Scouts noted symptoms of grape black rot in some locations.  Light to moderate defoliation due to Japanese beetle feeding has been found across vineyards.  The recommendation to control Japanese beetles was made in one location.  The second generation flight of grape berry moth has started, moths were being caught in traps and this will trigger a timed control treatment to prevent damage to grape fruit.
  • Brambles, Blackberries and Raspberries: Spotted Wing Drosophila (SWD) were again caught in traps this week from traps set in raspberries and blueberries.  Growers are advised to start a preventative spray program for ripening berries.
  • Blueberries:  Harvest continues for mid-season blueberries.  SWD have been found in blueberry traps.  Growers with ripening fruit should consider a preventative spray program.  Blueberry maggot traps have remained at 0.

Tomato Horn Worms


As you can see in this photo, these worms can reach great lengths. This one was just over 3 inches once we got him stretched out. He was a bit agitated in this photo so it doesn’t show his true length.

tomato hornworms

The tomato horn worm is originally found in tomatoes.


We just happened to find this guy munching on some pepper plant leaves.

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Week of July 14 – 18 Scouting Report Summary


  • Corn: Scouted fields ranged from v7 to tasseling.  Grey leafspot continues to develop and is approaching threshold treatment levels in some fields and in some varieties.  Fall armyworm feeding damage was found ranging from 4-8% in some fields.  Japanese beetles have been found doing some light feeding damage on leaves.
  • Soybeans:  Scouted soybeans ranged from V7 to R1 stage of development.  Japanese beetle, bean leaf beetle and grasshopper feeding damage were found at low levels. Septoria brown spot was found.
  • Alfalfa: Potato leafhopper were noted at low levels.