Hello... I have moved to Nampa, ID,  and have bing cherry tree in my back yard.  This is a neighborhood and not near any orchards that I know of.  Its wonderful and I love the cherries.  But, we have fly maggots pretty bad.  Last summer I ID'd them as almost certainly Western Cherry Fruit Flies.  In looking for ways to control them; I found that you can use a Degree Day table <https://treefruit.wsu.edu/crop-protection/opm/western-cherry-fruit-fly/> to help time any applications.   On that site it says, "First fly is expected at 950 degree-days after March 1. Chemical control sprays should be applied on or before 1060 degree-days to target mature, egg-laying flies."  I'm fairly certain I'm reading the chart properly - taking the day's low temp and running down til l hit the day's high temp and recording that number.  Then added them all up.  My question is:  They say first fly is expected at 950 DD after March 1.  So does that mean I only count the DD from March 1, until I hit 950? Or do I begin the counting of DD on January 1?   Thank you for any help you can provide.