Here it is. The bane of Olive growers throughout all the Mediterranean
http://en.wikipedia.org/wiki/Olive_fruit_fly and now the states.
In Greece they call it the Dakos.
So my family has had olive groves in Greece for generations.
After learning about Permaculture I wanted to change the farming practices on our land to go organic and more permaculture minded, no sprays and no tilling. Though as I do not actually live in Greece to do the work myself(not yet) I had to speak to the farmer that we have employed, he tells me that the trees need to be sprayed to protect them from the Dakos and the only organic method to fight it is with traps, but if your neighbors don't use traps then it is pretty much useless to use them.
This seems like a pretty classic cookie cutter "Organic" approach. I.e. do everything the same as before just don't spray chemicals. Thats not very Permaculture in my mind.
Now I learned that one of the major causes of high acidity in olive oil is because olives infested with the Dakos are pressed (yes, the inferior quality olive oil you buy in the store probably has bug juice in it). Extra virgin olive oil is classified as having an acidity no higher than .8%. Which is very low. Apparently, my family's groves produce oil with acidity around .3%. Now given that is incredibly low acidity, they still need to be sprayed with chemicals to protect them from the insect infestations and I'm sure that has something to do with the quality of the oil as well. Who knows maybe we could even get it to .1% using Permaculture.
There must be a polyculture or guild approach that I'm sure was used but has been lost through the generations. Unfortunately both my grandparents are dead and other villagers are very, well how can I put this... fatalist(as many Greeks are). Does anyone here know of anything that can be planted to attract Dakos predators? What eats the Dakos? What can be planted with the Olive Tree to make it more resistant to the Dakos? Any Ideas? In Greece they say the Rose is the doctor to the grape. What is the doctor to the Olive? Would ranging chickens under the tree when the Dakos pupae emerge cause a decline in the poulation?
There must be something that used to be planted or grew with the trees before they ran sheep and goats underneath to eat every last green thing that sprouted from the ground and thoroughly compacted the soil.
Anyone growing Olives with success against the Dakos?