Prickly Sida (Sida spinosa L.) and Cotton Response to Pre- and Early Post-Emergence Herbicides

Prickly sida is a troublesome annual weed native to the USA. It was introduced in Greece over two decades ago and has since been infesting cotton crops, where it proved difficult control. A two-year field study (2021–2022) conducted (Karditsa, central Greece) heavily infested with prickly evaluate efficacy of nine treatments against this weed, using pre-emergence (PRE) early post-emergence (EPOST) herbicides applied at rate. At 8 weeks after treatment, control 90% pyrithiobac PRE (68.9 g ai ha−1) alone or mixture s-metolachlor (960 isoxaben (150 application + (34.5 960 followed by EPOST ha−1). Flurochloridone fluometuron (375 2000 ha−1), flumioxazin (50 pendimethalin terbuthylazine (1500 750 controlled 89–93% 2021 82–90% 2022. Pyrithiobac trifloxysulfuron did not adequately sida. Yield significantly lower weedy check compared treatments. None caused any visual injury crop reduction density. Our results can help successful management non-transgenic maximize yield quality.