Hyn Patty
Shohin
Just a reminder that if you use both oil based sprays and sulfur, please be very, very careful. Residue, especially from some oil based sprays, can last for many weeks after application. Even months if the plants are sheltered from heavy rains, depending on which kind of oils are used. It is best to use only one or the other when treating your plants - either use sulfur based products and exclude all oil based, or the other way around. If you use both, you are at risk of killing your trees and should use great care. It can be done but if you forget what you used last and when, it could be fatal for your plants.
Also, here is a useful link on phytotoxicity in plants with common chemicals, and a list of some species some chemicals like malathion should never be used on:
http://www.grounds-mag.com/mag/grounds_maintenance_phytotoxicity_unexpected_danger/
And an excerpt below from that page that may be of particular interest to bonsai growers:
"Plant sensitivity Perhaps the most frequently observed phytotoxic damage is due to the fact that not all plants get along with all chemicals. For example, malathion, a commonly used insecticide, is phytotoxic to Hibiscus, Lantana, petunias, white pine (Pinus strobus), maples and many species of fern. Sulfur is toxic to Viburnum spp. Horticultural oils can harm tender new growth and foliage of particularly sensitive species such as mountain ash, beech and birch. Atrazine, a commonly used herbicide, selectively controls weeds in St. Augustinegrass but may damage ryegrass."
Hopefully none of you will make the mistake of applying any oil based and sulfur sprays in the same season to the same plants like I did years ago. The resulting damage, even though the sprays were applied weeks apart, was very sad.
Also, here is a useful link on phytotoxicity in plants with common chemicals, and a list of some species some chemicals like malathion should never be used on:
http://www.grounds-mag.com/mag/grounds_maintenance_phytotoxicity_unexpected_danger/
And an excerpt below from that page that may be of particular interest to bonsai growers:
"Plant sensitivity Perhaps the most frequently observed phytotoxic damage is due to the fact that not all plants get along with all chemicals. For example, malathion, a commonly used insecticide, is phytotoxic to Hibiscus, Lantana, petunias, white pine (Pinus strobus), maples and many species of fern. Sulfur is toxic to Viburnum spp. Horticultural oils can harm tender new growth and foliage of particularly sensitive species such as mountain ash, beech and birch. Atrazine, a commonly used herbicide, selectively controls weeds in St. Augustinegrass but may damage ryegrass."
Hopefully none of you will make the mistake of applying any oil based and sulfur sprays in the same season to the same plants like I did years ago. The resulting damage, even though the sprays were applied weeks apart, was very sad.
