Chuzhou, Anhui: a 67-year-old farmer sprayed 150 mu of sesame by drone with an AI assistant's 'weeding and pest-control plan' that named a soybean-field herbicide; the seedlings died overnight
On 10 July 2026 a 67-year-old farmer in Chuzhou, Anhui, who said he had relied on an AI assistant app for more than a year for questions such as when to spray and fertilise, asked it for a weeding and pest-control plan for his sesame field and then for a drone-spraying version. The app produced a 'full plan for 100-mu sesame aerial weeding and pest control' recommending the herbicides haloxyfop-P-methyl (高效氟吡甲禾灵) and fomesafen (氟磺胺草醚) and two insecticides. He sprayed the whole 150-mu field; the next day grass and seedlings had died together. A nearby pesticide dealer and an agronomist told Lizhi News (Jiangsu Broadcasting) that fomesafen is a broadleaf herbicide for soybean fields that must not be sprayed on sesame, and that spraying it across a whole field kills the crop; asked afterwards, the app itself said fomesafen was the cause. The chat window carried a small header line saying AI output may be wrong and should be verified, which he said he had never noticed. The app's customer service said the software has no knowledge base of its own and assembles answers from public web content, and logged the loss for follow-up; no reply or compensation was reported by publication on 1 August 2026. Relays put the loss at about 150,000 yuan; that figure is not in the text of the originating report.
Added 20/09/2026