Using vegetable and fruit oils to kill bugs

Hi Yolanda,I would appreciate if you could help me a little with spraying fruit trees. I have just bought a Stanley plum and a nectarine tree in May. I was looking at your video for when to spray them for bugs and how to do it. You say you think it is only necessary to spray once a year after all the leaves have fallen off the tree just before winter. You also say to use a water and vegetable oil mixture and spray it all over the tree. Can you tell me what the ratio of water is to the vegetable oil? I would like to give this a try. In looking at mixes at the nurseries it says to spray trees many times throughout the summer. Your advice is totally different. I live in Michigan. This is my first time with fruit trees. Thanks for any information you can give me. Pat

Thanks Pat for the e-mail.
I do not use oil on my trees because there are not many bugs in my trees and I can deal with a few spots on my apples.
If there are lots of bugs, by spraying oil on the trees in the winter you stop them from coming out in the spring. If you see bugs anywhere on your trees or plants, use water. I spray the trees with water and hose off all the bugs. Do this three times in a week.
If there are still bugs, you can use a 50/50 mix or less and make sure and shake well when spraying to mix. You can spray anytime of the year with oil and any kind of oil will work as long as it is from a plant-olive, vegetable, canola, sesame.......
The video was about spraying in the winter to stop the bugs in the spring but you can spray anytime. Oil works to kill all bugs including ants and aphids. Don't spray trees if there are no bugs. Thanks!
Yolanda