Kyle from Big Orange Country, Tn writes
Our (knockout) rose beds are difficult to access after spring greenup. It is much easier to apply soil treatments after the late winter pruning, and prior to adding mulch cover. Will a soil treament applied in late March still provide systemic protection from adult Japanese Beetles in mid-June and July once the beetles emerge?
Adonis 2F Insecticide/Termiticide can take up to 8 weeks to be translocated throughout the plant and is best applied when roses are actively growing (but before pests are present) to be able to absorb the product. You will need to water in daily for 7-10 days after application to get it to the roots effectively. Applying closer to the time the beetles become active would be best.
Answer last updated on: 06/22/2018
