Summit Year Round® Spray Horticultural Oil - 32oz - Ready-to-Use - Trigger SpraySummit Year Round Spray Horticultural Oil 32oz Ready to Use Trigger Spray Horticultural oils that kill and repel a multitude of insects on a wide variety of plants without synthetic toxins. For organic production. Kills insects through the physical action of "smothering" as opposed to traditional insecticides that "poison" pests. Kills a wide variety of insect pests, typically referred to as "soft bodied insects". Such as aphids, scale, adelgids,