TY - JOUR N2 - Currently more and more research is being done on integrated weed management to reduce or avoid herbicide use. Some growers are already using isotherapic dilutions to control weeds in organic farming. Isotherapy is different from homeopathy because it uses diluted and potentized (succussed) solutions of alcoholic macerate of the very pest causing health troubles. We set up a germination experiment to test if isotherapic dilutions of leaf macerate of annual ryegrass affect the dynamics of its seed germination in Petri dishes. Our results were diverse, from no effect to 10% more growing degree days necessary to reach 50% germination. It is doubtful that so low an effect will contribute to integrated weed management unless the slightly delayed germination triggers secondary effects at other life stages. This is in accordance with the scientific literature on that topic: two-fifths of the reports showed no effect, two-fifths resulted in positive responses and one-fifth had diverse responses for the criteria tested. L1 - http://journals.pan.pl/Content/109971/PDF/Gwladys.pdf L2 - http://journals.pan.pl/Content/109971 PY - 2019 IS - No 1 EP - 25 DO - 10.24425/jppr.2019.126041 KW - germination KW - homeopathy KW - isotherapy KW - plant protection KW - review KW - ryegrass KW - weed control A1 - Fontanieu, Gwladys A1 - Darmency, Henri PB - Committee of Plant Protection PAS PB - Institute of Plant Protection – National Research Institute VL - vol. 59 DA - 2019.04.04 T1 - A glance at isotherapy to control weed germination SP - 19 UR - http://journals.pan.pl/dlibra/publication/edition/109971 T2 - Journal of Plant Protection Research ER -