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Effect of temperature on herbicidal properties of MTB‐951, a mycoherbicide to control Echinochloa crus‐galli L.
Author(s) -
HIRASE KANGETSU,
YOSHIGAI SATOSHI,
NISHIDA MAKOTO,
SHINMI TATSUO
Publication year - 2004
Publication title -
weed biology and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 36
eISSN - 1445-6664
pISSN - 1444-6162
DOI - 10.1111/j.1445-6664.2004.00140.x
Subject(s) - echinochloa , echinochloa crus galli , conidium , germination , biology , weed , mycelium , horticulture , oryza sativa , botany , biochemistry , gene
MTB‐951 is a potential mycoherbicide using a fungal plant pathogen ( Drechslera monoceras ) isolated from native Echinochloa species in Japan. Conidia of this pathogen were used as the active ingredient and the effect of temperature on its properties was examined in a laboratory. The optimum temperature for conidium germination was broad between 15 and 35°C and no difference in the germination ratio existed within this temperature range. Mycelial growth was the fastest at 25°C but was slower outside of the range 15–35°C. When leaves of Echinochloa crus‐galli L. were immersed in deionized water containing the conidia, cellular electrolyte leakage from the leaves was observed. However, no electrolyte leakage occurred from leaves of rice ( Oryza sativa L.) under the same conditions. The occurrence of electrolyte leakage from E. crus‐galli was dependent on the temperature and was the highest at 25°C. Herbicidal activity of MTB‐951 against E. crus‐galli was high between 25°C and 30°C, but decreased at 35°C in a glass vessel. In the present study, it was revealed that the physiological and herbicidal properties of MTB‐951 depended on the temperature.