White Grub White grub

 

White Grubs

 

 

      White grubs may be abundant in fields following sod or severe grassy weeds in row crops, or where manure has been spread extensively. Several species of white grubs occur in Kentucky.


Damage

    White grubs prune roots of the plant. The damage is gradual and affected plants wilt or show signs of drought stress. Injury usually shows up about 2 - 4 weeks after plant emergence.


Assessment

     Soil insect pressure can be high in NO-TILL corn planted directly into ESTABLISHED SOD. Use of a soil insecticide is recommended when planting corn directly into sod because of the high probability of damaging populations of soil insects.


Recommendations

    There are no rescue treatments.
Best results can be expected when the insecticide is placed directly in the furrow. Both seed and granular insecticide should be covered with soil immediately after application.

Insecticides for White Grubs
Insecticide Application Ounces / 1,000' of row
Aztec 2.1% G Band, T-Band, or Furrow 6.7
Capture 1.15G T-Band 6.4 - 8 fl oz
Capture 1.15G Furrow 3.2 - 8 fl oz
Capture 2EC Band 0.3 fl oz
Counter 15% G Band 8
Counter 20% CR Band 6
Force 1.5% G Furrow 10
Force 3% G Furrow 5
Fortress 2.5% G T-Band or furrow 6
Fortress 5% G T-Band or furrow 3
Lorsban 15% G Furrow 8-16
Mocap 15% G Band 12
Regent 4 SC Microtube injection or infurrow band 0.24 fl oz/1000" row