What is this small black grub that's turning my cherry tree leaves into lace?

my cherry tree has a small black grub-like critter turning the leaves to lace and the standard pyrethrem spray doesn't slow them down. any suggestions?

yates

06 January 2019 12:11 AM

Dear Lynne

Your cherry tree is being atacked by the Pear & Cherry Slug. The product to use to control this pest is called Yates Success Ultra. When using this product ensure that all foliage, including undersides of leaves are thoroughly sprayed. Apply in early morning or late afternoon.

Topics: Fruit and Citrus Issues: Pests