Petri dish method

Various bioassay methods have been used to detect the "natural" release of allelopathic agents. Sane authors preferred, after partial purification, to assay the extracts by petri dish methods for gemination, growth of roots or shoots and other symptoms of seedlings. The bioassays also included tests in soil or sand and also in nutrient solution (Table 3). 

Non-flooded Petri dish method as described in Foissneretai. (2002). 

Petri dish methods - bacteria/actinomycetes Organisms... 

Petri Dish Methods - Fungi (non-nutrient media)... 

As a preliminary bioassay, some alkali metal salts of (9-aIkyl 1-(substituted phenoxyacetoxy)aUtylphosphonic acids IIA-IIE were tested for herbicidal activity on barnyard grass (Echinochloa crusgalli) and cabbage type rape (Brassica napus) by the Petri dish method. For further herbicidal activity evaluation, most of... 

As a preliminary bioassay, all the mono salts of 1-substituted phosphonic acid HF, IIG and IIH were tested at 100-10 mg/L for inhibitory effect against barnyard grass E. crusgalU) and cabbage type rape B. napus) using the Petri dish method. The results are listed in Tables 3.25, 3.26 and 3.27. 

As a preliminary bioassay, the inhibitory activity of cyclic 1-hydrox-yalkylphosphonates IVA and IVB against barnyard grass (Echinochloa crusgalli) and cabbage type rape Brassica napus) were tested by using Petri dish methods. The inhibitory effect of IVA and IVB against the growth of roots and stems of tested plants were examined. The results are listed in Table 5.5. 

As seen from Table 5.18, most of cyclic phosphonates IVE displayed significant inhibitory effect (>90 %) against the growth of stem of dicotyledonous cabbage type rape, but showed much weaker or no inhibition against the growth of stem of monocotyledonous barnyard grass except IVE-7 with 80 % inhibitory activity at 100 mg/L. Based on the preliminary bioassays by Petri dish methods, the post-... 

The herbicidal activity of IVG and IVH evaluated by Petri dish methods and in the greenhouse. The results are reviewed as follows. 

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