FRASS
Frass is a sawdust-like substance created by boring insects such as Peach Tree Borers and Squash Vine Borers. The frass is a mixture of plant material and insect waste.
frass
Fecal matter left behind by insects or insect larva.
frond ...
Frass-Plant tissue mixed with excrement produced by boring insect larvae. It often resembles wet sawdust.
Frost pocket-A depression in the terrain into which cold air drains, but cannot escape, thereby subjecting plants to freeze injury.
frass. Solid fecal material produced by insects.
fruiting bodies. In fungi, reproductive structures containing spores.
fumigation. Treatment with a pesticide active ingredient that is a gas under treatment conditions.
When the frass is removed from the trunk, holes will be the evidence of borer activity. Pushing a piece of wire or a straightened out safety pin into the holes to kill the bug is a simple method that avoids the use of harsh chemicals.
Hornworm with frass
Hornworm damage usually begins to occur in midsummer and continues throughout the remainder of the growing season.
CONTROL: ...
Collections of frass produced by feeding of dogwood borer on burrknot surface ...
Look for chewed leaves (a caterpillar may be on the leaf or nearby) or frass (dark pellets of excrement) on leaves or leaf axils. Some larvae feed communally; look for batches of Mourning Cloak larvae on willows.
Corn earworms enter the corn at the silk end of the ear and eat the corn, leaving unsightly brown frass behind. To prevent the damage, drop some mineral oil on the silk at the top of each ear, three to seven days after the silk appears.
You can often see a small hole and some frass that looks like sawdust. The injury can girdle the stem and prevent the plant from taking up water and nutrients, causing it to wilt and ultimately to die. Multiple borers can be found in one stem.
"My Ivy I'm trying to kill is on a Sassafrass tree. I tried pulling if off, as best I can, but it's hurting the bark and I'm afraid of hurting the tree further. I have severed alot of lifelines, but I have 2 HUGE ones left. Any Ideas??"
Vanished ...
If you notice frass around a hole, slit the vine near the hole to locate and destroy the borer. Or try to kill the borers by injecting Bacillus thuringiensis into stems with a syringe.
Thrips are characterized by a silvery white discoloration on the leaf's upper surface and silvery on the bottom with small black frass specks. The damage is similar to that from lace bugs.
Keep an eye out for the tell-tale dark holes on the stems, which sometimes weep if water is getting in, and the accumulation of white frass, which is actually fine "sawdust" that has been excreted by the grub.
 See also: Insect, Larva, Plant, Larvae, Genera
  
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