Hi We have a wonderful large walnut tree in our back yard. I don't know which kind it is. The nuts are very large and the leaves are medium. There are two problems though. The tree supposedly has "husk flies" and needs pruning. Can someone point out how I can treat the tree to "sensibly" combat the husk flies next spring? Thank you for your help!! Please ask more questions if clarification is needed. Greetings from Kelowna Martin