Bioworks Epishield - 8 fl ozBioworks Epishield 8 fl oz Developed with a proprietary, scientifically backed blend, EpiShield delivers up to 53% higher mortality rates on mites and aphids than similar products, while using 10 times lower application rates. With no restricted entry interval or pre harvest interval, EpiShield lets you continue your cultivation without interruption. You can spray up until the day of harvest while keeping yourself and your plants vibrant and healthy.