Week of July 14 – 18 Scouting Report Summary


  • Cole crops: Cabbage, Cauliflower and Broccoli:  Scouts reported that both plantings that are under harvest as well as plantings put in for fall harvest looked good, no big pest problems.
  • Onions and Garlic:   Many onion plantings are ready to harvest.  Thrips are generally present but at low levels, well below threshold.  Botrytis leaf and neck rot are present in some plantings.
  • High tunnel tomatoes: Early blight and alternaria leaf blight are present in many high tunnel tomatoes.  In addition, scouts found timber rot, yellow shoulder and zippering present.  Some feeding on tomato fruit by the tomato fruit worm was also noted.
  • Field tomatoes:  Bacterial speck, spot and canker all being found on plants.  This week scouts reported finding fruit with bacterial speck and spot.  Early blight and septoria leaf spot incidence is increasing.  Timber rot on a few plants was found.  Blossom end-rot is also being found.   A tomato was submitted to the diagnostic lab for possible Buckeye rot.  Feeding on the tomato fruit by tomato fruit worm and European corn borer larvae was found.
  • Sweet corn: Much of the corn is silking and ears are developing in 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.  Some western bean cutworm moths were found in a trap.   In a field of recently planted sweet corn, scouts found black cutworm and black cutworm damage to the stand over threshold treatment level.  Fall armyworm was also found in some fields.
  • Cucumbers:  Harvest is under way in some plantings and there have been some plantings made for intended fall harvest.  Cucumber beetles are at threshold treatment levels in some of the new plantings and some bacterial wilt symptoms are being observed in older plantings.  Angular leaf spot, a bacterial disease, is common in many plantings.
  • Zucchini and Summer Squash:  Squash bug adults and eggs can be seen in some fields at low levels.  Angular leaf spot is common and powdery mildew incidence is increasing.  Blossom end rot was noted.
  • Winter Squash and Pumpkins:  Cucumber beetles were at low levels along with Japanese beetles.  Angular leaf spot is common and anthracnose is also being found.  Some plants are showing symptoms of bacterial wilt.  Target spot was diagnosed this week.
  • Melons: Anthracnose and bacterial wilt have been found.  Angular leaf spot has also been detected by scouts and confirmed with lab diagnosis.  Grasshoppers are doing some light feeding damage, typically starting in grassy areas of the field.
  • 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.  Early blight and alternaria leaf spot are present in some plantings
  • .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.
  • Green/Snap Beans:  Bean leaf beetles were very light, Japanese beetle feeding damage ranged from light defoliation to moderate defoliation.

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