Thrips Thrip Pressure Still Low Onion thrips counts remain low despite dry, hot days and no scouting locations have yet reached the 1 thrips/leaf threshold. Warm temperatures drive development and the speed at which new generations arise. Nearly all Maine locations have accumulated enough growing degree days (140 GDD52.7ºF) for the overwintering generation to emerge.
read more Garlic IPM Newsletter No. 11 — June 26, 2025