When is the optimal time to control bluegrass billbug larvae?

Controlling bluegrass billbug larvae is most effective in June because this is typically when the larvae are actively feeding and younger, making them more susceptible to control measures. During this time, they are still in their early developmental stages, which allows for better absorption of insecticides when applied.

Insects like the bluegrass billbug have a specific life cycle, and timing your control efforts to coincide with their larval feeding period in late spring to early summer is critical. By targeting them during June, turf managers can apply treatments when larvae are present and vulnerable, which helps to mitigate their damage to the grass.

Other months are less effective for control. For example, in April, the larvae may still be developing in their eggs or pupal stages and not yet active. In July and August, larvae may have reached later instars or even pupated into adults, making chemical control less effective. Hence, June represents the narrow window of opportunity for effective intervention against bluegrass billbug larvae.