Week of August 4 – 8 Scouting Report Summary


  • Cole crops: Cabbage, Cauliflower and Broccoli:  In several fall harvest plantings of cole crops flea beetle numbers increased to above treatment threshold.  Some growers were also advised to start protectant sprays against cabbage worms.  Anthracnose was detected in some fall plantings.
  • High tunnel tomatoes: Early blight continues to progress in many high tunnels, growers are encouraged to maintain a regular and consistent spray program.  Bacterial spot and speck are present in some plantings.  Some bacterial soft rot was found.  Yellow shoulder and blossom end rot, 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.  Two-spotted spider mites were also found.
  • Field tomatoes:  Bacterial speck, spot and canker all being found on plants.  In some plantings bacterial spot, speck, and canker are being found on the tomato fruit.  Early blight and septoria leaf spot incidence is increasing.  Blossom end-rot, and yellow shoulder are also being found.   Damage by variegated climbing cutworms was noted.
  •  Sweet corn: Development stages range from some v4 for late planted corn to harvest on some plantings.  One corn earworm moth was found at one of the three locations where traps are set. Eastern corn borer moth trap count was 19 spread over 3 locations, a slight decrease in moth numbers from the previous week.   Western bean cutworm larvae were found in one field at numbers above the treatment threshold.  Some corn rootworm beetles were noted in some sweet corn fields.   Four stink bugs were caught in one trap, and one of those was the brown marmorated stink bug.  In many fields, deer are a much bigger problem than insects or disease.
  • Cucumbers:  Harvest is under way in some plantings and there have been some plantings made for intended fall harvest.  Cucumber beetles were reported at high levels in some of the young cucumber plantings.  Powdery mildew is showing up in many plantings.
  • Zucchini and Summer Squash:  Development ranges from plantings a couple of weeks old to full harvest.  Cucumber beetle numbers were lower than the previous week.  Squash bug adults and eggs can be seen in some fields at low levels.  Angular leaf spot and powdery mildew are present in most if not all plantings.   Fusarium wilt was found this past week.
  • Winter Squash and Pumpkins:  Cucumber beetle numbers in several plantings increased to above threshold numbers.  Damage by the squash vine borer was noted on some plants.  Angular leaf spot, anthracnose, bacterial wilt and powdery mildew are present in many plantings.   Scouts noted feeding damage by deer, groundhogs and racoons.  Some of the raccoon damage was very heavy, with
  • Melons: Angular leaf spot,fusarium wilt, and phytophthora blight have been found.  Cucumber beetle numbers were light this week.  A few squash bugs were found on melons.
  • Potatoes:  Some early harvest of potatoes has started.  Colorado potato beetles (CPB) were causing heavy defoliation in some plantings.
  • Peppers:  Bacterial spot continues to develop.  Blossom end rot can also be found.  A few plantings had fruit with bacterial soft rot.  Some of the soft rot can be attributed to fruit damage caused by corn borer larvae.   Aphids were detected on some plants along with a good number of lady beetles.
  • Eggplant: Anthracnose found on some plants.  This week scouts found some plantings with high numbers of flea beetles well above threshold levels.  Colorado potato beetle feeding damage was also found.
  • Green/Snap Beans:  Beans generally look very good.  Some light feeding damage by Japanese beetles in some plantings was noted.

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