I found eggs 2 years ago small black dots by houndreds layd in the groove
behind the needles of a black pine and this is a problem ..
I used some winter oil mixed with a product against larvae and eggs

It was the first time iit happened but it seems that a conony of these pests when
a dult can eat out a whole tree( bonsai) within hours like locusts..
so better prevent in case..
Theo

Carol Schroeder wrote:

Help! Today I discovered a cluster of ants on an Eastern White Pine,
and looking closer, noticed several green caterpillars with brown heads
covering the tip of branches nestled among the new growth. They were
about one-half inch in length. I pulled off all that I saw. Should I
be spraying or has the damage been done? The tree appears healthy
otherwise.

Any suggestions appreciated.

With thanks,

Carol Schroeder
Columbia, MD
Zone 6/7

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