Description : What insect caused the 1/2 inch holes in the stem of my willows?
Last Answer : could be termites or carpenter ants...............try straight vinegar in the hole with a funnel....do it every day for 1 week.....about 2 cups................ That is the safest ... cone out of foil and then bag and trash it...I always use throw away gloves with chemicals with goggles & face mask.