We have several dwarf balsams about 8yrs old, have done well until this year but turning brown in large patches. very hot summer watered every night by irrigation.  Why the brown?�

Dear Len,
Balsams are susceptible to aphid damage and it is called Balsam twig aphid.  It does cause brown areas of twig death.  Aphids have been prevalent this past month and we are seeing more questions about them on many different plants. Look closely and see if there is a sticky substance on the dead needles.  That would indicate aphid damage.  One other suggestion that I may give you is not to water at night if possible.  Early in the morning is much better for both lawns and plants.  If foliage stays wet all night many fungal infections can grow.  If watered in the morning the plants can dry off in the early daylight. I hope this is of some help.  Thank you for your question.