Safer® 5611 Concentrate Hose End Organic Grub Killer, RTS. 32 OzKills larval stages of insects including Leafminers, Gypsy Moths, Webworms, Hornworms, Grasshoppers, Chinch bugs, Billbugs and White Grubs. White Grubs are the larval stage of beetles including Japanese Beetles and Northern Masked Chafer grubs. Utilizing a derivative of the seed of Neem trees, this Grub Killer controls by 3 modes of action resulting in broad spectrum control. It disrupts insects delicate hormonal balance so they die before molting to