In most cases, the greatest damage occurs as the fruit begins to soften and turn color, from September to November. DETECTION The bottom cup part is filled with a yeast in water solution. McPhail traps are used extensively in Europe, primarily for monitoring, but sometimes for mass trapping. They have the additional advantage of producing less pollen that may aggravate people’s allergies. The body is long with clear wings containing dark veins and a small dark spot at the wing tip. When does the greatest amount of damage by olive flies occur to the fruit? The traps have two … A plastic two part trap. Product Description. Below are the available bulk discount rates for each individual item when you purchase a certain amount. The theory (I think) is … Read the instructions carefully about how to handle and place the bait and pheromone. The olive fruit fly was first detected in North America infesting olive fruits on landscape trees in Los Angeles County in November 1998. All olive varieties, however, are susceptible. In the fall most of the last generation larvae leave the fruit and pupate in the soil under the tree for several months. Kaolin clay (brand name Surround) is a particle film. Droplets 1/6” to 1/4” (4 to 5mm) in diameter will best resist evaporation. 2005). First generation new adults from overwintered pupae start emerging in early spring. In southern California and coastal areas such as San Diego County or Santa Barbara County, development may be continuous throughout the year. Paul Vossen, Lucia Varela, and Alexandra Devarenne: Olive Fruit Fly, Paul Vossen: The Spanish "Olipe" Trap for Organic Control of Olive Fruit Fly, Marshall Johnson: Olive Fruit Fly: Biology, Control and Research Update 2006, Olive Fruit Fly Integrated Pest Management for Home Gardeners and Landscape Professionals, Paul Vossen and Alexandra Devarenne: Controlling Olive Fruit Fly at Home, UC IPM How to Manage Pests in Gardens and Landscapes - Olive Fly, Copyright © 1998-2021 The Olive Oil Source | 1.805.688.1014 |. The exact mechanism by which this happens is not known. Olive fruit fly larvae attack the fruit of the olive tree, causing premature fruit drop or pulp destruction. Two traps should be placed for each 5 to 10 acre block of trees to evaluate treatment efficacy. For those wishing to harvest and use the fruit, management of olive fruit fly in the future will depend on a combination of tactics including bait sprays, attract-and-kill trapping of adult flies, harvest timing, fruit … The olive fly is attacked by a number of parasitoid species in the Mediterranean and also in sub-Saharan Africa, where the fly is thought to have originated. Reducing black scale populations may reduce a food source needed during high summer temperatures. The spiroketal lures should be changed every 4 to 6 months and ammonium bicarbonate packets every 2 to 6 weeks. To count the number of olive flies in a McPhail trap, the solution must be poured through a sieve that captures the flies. The olive fruit fly poses a serious threat for all olive growers. More traps per block are necessary to evaluate fly activity or density. Replace the solution monthly. 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