灰色かび病菌の病害防除におよぼすペンチオピラド微粒子のサイズ効果

抄録

The particle size effect of pesticide (penthiopyrad) on the control of plant diseases was investigated. First, monodisperse penthiopyrad particles could be prepared by the poor solvent dilution method. Next, three types of penthiopyrad particles with different median diameters were prepared and sprayed on the cut leaves of cherry tomato prior to inoculate gray mold fungi (Botrytis cinerea). As a result, it was suggested that pesticide micronization improved the control effect against plant pathogen, and that pesticides could be reduced by about 60%. In addition, when fluorescent penthiopyrad particles were exposed to the hyphae of gray mold fungi, pesticide micronization was also found to improve the penetration of pesticides into cells. From the above, it was demonstrated that the pesticide micronization increases the probability of contact with plant pathogens and uptake into fungus cells, thereby improving the control effect of pesticides.