Guard 'n Spray contains botanical oils which plant pests consume. Upon consumption of Guard 'n Spray's active ingredients, plant pests cease to digest needed proteins causing them to starve. While Guard 'n Spray is stopping the pest’s digestion of the proteins needed for survival it is concurrently coating and asphyxiating the exoskeleton by clogging the organism's spiracles. As the plant pest is starving and suffocating, Guard 'n Spray's other active ingredients are simultaneously desiccating the plant pest's exoskeleton. When treating and controlling plant pests in the larvae stage Guard 'n Spray should be diluted and drenched (watered) into the soil or growing media where the larvae live. Guard 'n Spray’s active ingredients also kill and control fungi by drying out their reproductive portions and stopping both sexual and asexual reproduction.