Note:  Next week (10/07/20) will be the final regular edition of the Vegetable IPM Update for 2020.  We will post alerts should special pest situations arise.

Sweet Corn

Corn earworm (CEW) moth captures continue to decline, although with temporary increases on warm nights.    Growers should consider this pest to still be at moderate population levels in the state, with higher risk during stretches of warmer nights.   The current population poses a significant risk to silking corn.  Green areas on this map (see map at left)   represent a 3-day spray schedule.  However, night temperatures in the 40 to low 50 F range, may permit the extension of that spray interval by a day.  For further information on CEW activity, see pheromone trap information below.

The highest nightly trap catches of CEW in black light traps for the week ending 9/30/20 are as follows:

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Sweet Corn

Corn earworm (CEW) moth captures have declined dramatically with cold night temperatures.  As nights warm again toward the weekend, we may see some recovery in adult activity.  Growers should consider this pest to still be at moderately high population levels in the state unless warmer nights indicate that the threat has diminished.     The current population poses a significant risk to silking corn.  Green areas on this map (see map at left)   represent a 3-day spray schedule.  However, night temperatures in the 40 to low 50 F range, may permit the extension of that spray interval by a day.  For further information on CEW activity, see pheromone trap information below.

The highest nightly trap catches of CEW in black light traps for the week ending 9/23/20 are as follows:

[Read more…]