Toxicity Measurement of 12 Fungicides on Phyllosticta commonsiy from Peony

doi:10.11924/j.issn.1000-6850.2014-2458

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Chin Agric Sci Bull ›› 2015, Vol. 31 ›› Issue (19) : 122-125. DOI: 10.11924/j.issn.1000-6850.2014-2458

Toxicity Measurement of 12 Fungicides on Phyllosticta commonsiy from Peony

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Abstract

In order to select effective chemicals to control Phyllosticta commonsii, indoor toxicity of twelve fungicides on Phyllosticta commonsii, and their relative inhibition rates at 10 mg/L against Phyllosticta commonsii were tested by the hypha growth rate in lab and toxicity measurement with five different concentrations. The results showed that, at 10 mg/L, 70% chlorothalonil WP had the strongest relative inhibition rate against Phyllosticta commonsii, with the relative inhibition rate of (65.19±2.80)%; then was the relative inhibition rate of the 80% mancozeb, which was (64.81±4.49)%, the relative inhibitory rate of 32% YBJ was the lowest, which was (25.56+4.01)%. The results indicated that in laboratory, eight kinds of fungicide of the test concentration had a certain inhibition effect on the growth of Phyllosticta commonsii. Muldewcarbendazim (50%) showed the best effect on the Phyllosticta commonsii, its EC50 value was only 2.6268 mg/L, the following one was chlorothalonil WP (70%), its EC50 value was 2.9781 mg/L. In addition carbendazim and hymexazol also had effective inhibition. The study provided the basis for controlling Phyllosticta commonsii in field.

Key words

Phyllosticta commonsii; the relative inhibition rate; toxicity measurement; fungicide

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Toxicity Measurement of 12 Fungicides on Phyllosticta commonsiy from Peony[J]. Chinese Agricultural Science Bulletin. 2015, 31(19): 122-125 https://doi.org/10.11924/j.issn.1000-6850.2014-2458

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