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Investigate the effect of fruit development on OLFF oviposition and survival.
Investigate the efficacy and assist in the registration of spinosad bait (GF-120) on olives.
Investigate the effect of post-harvest ethephon applications on spring emergence of OLFF.
Investigate OLFF population dynamics following applications of ethephon and GF-120.
Laboratory insecticide trials indicated that full rate cover sprays of Malathion, Success, and all pyrethroids, plus NuLure provided good control of OLFF at 1/2 and 1 DOE. GF-120 also provided good control of OLFF at 1/2 and 1 DOE.
In a field trial, the high rate of Danitol provided effective control of OLFF at 0 DAT. At 3 DAT, both rates of Danitol and GF-120 were similar. By 7 DAT, only Danitol provided partial control. However, inclement weather resulted in termination of the study before the materials could be properly evaluated.
The postharvest application of Ethrel accelerated fruit drop at 600 ppm. However, the higher rates of application also led to leaf drop. It appears that buffering Ethrel decreases phytotoxicity to acceptable levels. Fruit drop needs to be improved to provide effective control.
Fruit that is present for the spring OLFF flight can be oviposited. However, once fruit falls to the ground, it is highly unlikely that OLFF will oviposit on the fallen fruit or that the fruit will produce a viable OLFF.
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Statewide IPM Program, Agriculture and Natural Resources, University of California
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