Important notice on avoiding sun spotting of leaves:

There is some alcohol in the product that if applied too heavily or in hot direct sunlight, could cause small brown spots on the leaves. To avoid this spray only on cloudy (not hazy) days or early mornings before the sun is high or late afternoons or evenings. Choose a day that is not windy. Set the sprayer for a fine mist. Mist plants from a distance of 12 to 14", being careful not to coat or thoroughly wet the leaves. After application, the leaves should look waxy with minute droplets of product. It is better to mist, let dry, and re-apply than to apply a single heavy spray. If large droplets touch the plants wipe them off with a paper towel. Never allow the spray to touch flower blooms. Protect any open blooms before spraying.

Never modify this product:

Never add horticultural spreader -sticker or any type of soap or detergent to Iris Borer Deterrent. Any additives will interfere with the effectiveness of this product. Do not mix with any other garden chemicals, sprays or treatments of any kind. If necessary, apply other foliar products to irises 48 hours before applying or re-applying Iris Borer Deterrent.

The night flying iris moth lays her eggs on dead vegetative matter in and around irises in the fall (August - October, depending upon location). These eggs overwinter and hatch in the spring after the first two consecutive 70-degree or warmer days. A newly hatched larva climbs up an iris leaf and chews a hole near the top through which it enters the leaf. Over the period of a week or two, the larva eats its way down the leaf until it eventually enters the rhizome. The larva continues to feed on the rhizome, sometimes traveling underground to other rhizomes to continue feeding until it eventually pupates in the surrounding soil. Upon completion of the pupal stage, the adult moth emerges from the soil in the fall and begins the cycle anew.

Spring and summer:

Autumn:

Remove (do not compost) all plant debris and dead iris foliage from the garden in the fall. Beginning in August, mist iris foliage, exposed rhizomes and surrounding soil every 7 to 10 days and after drenching rains with Iris Borer Deterrent to repel emerging borer moths from plantings. This will help to break the life cycle of the borer.