Ovicidal activity of cycloprate for several phytophagous mite [Panonychus: Tetranychus] species and its relationship with the test host plants

Ovicidal activity of cycloprate (ZARDEXX(R), ZR-0856, hexadecyl cyclopropanecarboxylate) for the European red mite, Panonychus ulmi (KOCH), the citrus red mite, P. citri (MCGREGOR), the two-spotted spider mite, Tetranychus urticae KOCH, the kanzawa spider mite, T. kanzawai KISHIDA, and the desert spider mite, T. desertorum BANKS, was evaluated in laboratory bioassays with a leaf disk technique and a tower spray apparatus. The activity of this compound was also investigated in relation to the host plant species. The amount of spray deposits on the leaf disk of different plant species did not differ, but the ovicidal activity of cycloprate was affected considerably by the plant species rather than the mite species. In bioassays with the same plant species, there was no difference in the susceptibility to cycloprate among the five mite species. The physical and physiological properties of plant leaves appeared to influence the ovicidal activity of acaricides in laboratory bioassays with the leaf disk technique.