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A herbicide screening experiment determined the phytotoxicity (phyto) effect of norflurazon (NOR), simazine (SIM), bentazon (BEN), dicamba (DIC) and a nontreated control on sage (Salvia O/ficinalis L.), pot marjoram (Origanum onites), wild marjoram (Origanum vulgare subsp. vulgare), lavender (Lamndula angustifolia), winter savory (Satureja Montana), rosemary (Rosmarinus officinalis L.), and sweet marjoram (Origanum mejorana). A stripsplit plot design with four reps was sprayed with each herbicide at three rates. Phyto rating was determined 21 days after application. Differences between herbicides, rates and spices was significant. Interactions between each paii of factors and between the three treatments were significant. NOR proved to be the least phytotoxic herbicide. NOR was safe at½ X in wild marjoram, lavender, winter savory, rosemary and sweet marjora!D and at 1 X in lavender and rosemary; BEN at 112 X in sage, pot marjoram, winter savory and rosemary, and at 1 X in rosemary; and DIC at½ X in sage, rosemary and sweet marjoram showed potential. SIM killed the exposed plants at all rates.


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