But, permethrin is no cakewalk. It can be injurious to cats and birds. [While in a different category of chemicals thought to be safer for the nervous system, less is known about the long term effects].
So it’s important to look at the cumulative effect over several seasons. While permethrin has a lower labeled rate of application, you have to apply it every season. Many arborists use carbaryl because you only need to apply it once every other season, giving more flexibility.
One Victoria, BC based arborist wrote, “The best bet is to go with carbaryl; in theory one ‘proper’ application of Sevin XLR+ should be good for two years. Spray the even number trees one year and the odd numbered the next. You can spray early or late in the day when the honey bees are in their hives and it is effective. ”
.http://www.mountainpinebeetletreatment.com/category/treatments
.This quotation, "While in a different category of chemicals thought to be safer for the nervous system, less is known about the long term effects", is very important, because while trying to save trees from being destroyed there can be other damages being made. It's a given law that for every positive, there is a negative and that's what can be expected while using these chemicals. The positive side from spraying chemicals is that were potentially saving the pine beetle tree's from being damaged by the pine beetle. The negative effect from spraying is that it can cause damage to other animals in the area.
.Paraphrase: Carbaryl may be good to use to help prevent damage being caused to trees, but it can also cause damage to to other animals like birds and cats. The other bonus to spraying is the fact that there only needs to be one application to an area once every two years. To avoid damage to insects and other animals, spraying at certain times during the day and nights can be very helpful.
.Summarizing: Carbaryl is very useful because it prevents trees from being damaged. One of the side effects from using this spray is that it can hurt other animals and insects. Another plus from spraying is that it only needs to be applied once every two years.
Monday, March 15, 2010
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