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Photoswitchable azobenzenes offer light\u2010driven structural diversity that may temper resistance evolution, but their small\u2010molecule form limits foliar adhesion. Although supramolecular materials show promise as biofilm inhibitors, photoresponsive supramolecular polymers for this purpose remain largely unexplored. This study reports Azo@CB[8], a multifunctional supramolecular polymer that self\u2010assembles in water from a de novo azobenzene (Azo) and cucurbit[8]uril (CB[8]). CB[8]\u2010mediated association preserves photoisomerization, improves cycling stability, and integrates membrane disruption, redox imbalance, biofilm inhibition, sessile\u2010cell killing, and enhanced foliar affinity. In pot assays, Azo@CB[8] outperforms free Azo and thiodiazole copper against rice bacterial leaf blight, without detectable biosafety penalties, and likewise exceeds both controls against kiwifruit bacterial canker. Notably, photoisomerization perturbs azobenzene\u2010mediated host\u2013guest interactions while largely retaining bipyridinium\u2010CB[8] association, thereby reducing supramolecular connectivity and driving reconfiguration of the extended architecture into a smaller, less\u2010connected supramolecular ensemble. The photoirradiated supramolecular state retains antibacterial efficacy comparable to that of the initial assembly. Together, these findings outline a supramolecular polymer\u2010based, photoregulated route to greener management of bacterial plant diseases.<\/jats:p>","DOI":"10.1002\/adma.75187","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T08:02:41Z","timestamp":1790841761000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Light\u2010Controlled Supramolecular Reconfiguration Enables Sustainable Crop Protection"],"prefix":"10.1002","author":[{"given":"Xiaoxue","family":"Tian","sequence":"first","affiliation":[{"name":"State Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Center for Research and Development of Fine Chemicals of Guizhou University  Guiyang 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