the insect growth regulators ( igrs ) , diflubenzuron and bay sir 8514 , at 300 and 1,000 ppm a.i . in potato dextrose agar ( pda ) inhibited the radial growth of the fungus rhizoctonia solani host of aphelenchus avenae .
C0022439
insect growth regulators
C0012446
diflubenzuron