Larger areas may require truck-mounted sprayers or even aerial applications.
#WHITE MARKED TUSSOCK MOTH PORTABLE#
Small infestations can be treated using portable mist blowers. A second spray may be required 7-10 days after the first because of larval drift. followed by Orgyia leucostigma (the white-marked tussock moth) and finally. Treatment before this may prove ineffective due to reinvasion by wind-blown smaller larvae. The moths that are best known for their attractive larvae, are leaving their. The best control is obtained when larvae are approximately 12 mm long. The legal use of these differs from state to state in the USA. Other recommended insecticides are acephate, chlorpyrifos, diflubenzuron, fenitrothion, bifenthrin, lambda-cyhalothrin, permethrin and fluvalinate. Sprays of azadirachtin (Azatin), carbaryl (Sevin) and spinosad (Conserve) have proved effective against larvae. Commercially prepared hollow-fibre dispensers releasing the pheromone at rates of 0.7, 1.2 and 1.6 mg/plot each day caused 76-92% disruption of O. The whitemarked tussock moth occasionally occurs in epidemic numbers and heavilydefoliates several species of hardwood, primarily live oak, water oak. Caterpillars in the tussock moth subfamily tend to be brightly colored with distinctive groups of hair tufts, some short and some long, often with two long tufts in the front and two or three at the hind end. Planchet evaporators releasing the chemical at about 4.4 mg/plot each day caused 96-100% disruption of O. White-Marked Tussock Moth Caterpillar on Leaf. The pheromone was also effective in disrupting pheromone communication of wild populations of O. In 14 replicates, 50% of 864 males released in the untreated plot were recaptured but only 1.2% of 869 released in the treated plot were recaptured. Planchet evaporators releasing the sex pheromone ((Z)-6-heneicosen-11-one) of Orgyia pseudotsugata at an estimated rate of 4.4 mg/plot each day were used. Pheromone disruption experiments were carried out in Ontario, Canada in 1977 by releasing and recapturing laboratory-reared adult males of O. Sprays of Bacillus thuringiensis kurstaki (Dipel, Thuricide) have proved very effective against smaller larvae, and appear to have no detrimental effect on the main natural enemies. Once spun, the latter can be removed using rubber gloves. The white-marked tussock moth and its control on shade trees and orchard trees : Ottawa : J. In urban areas, the larvae can be removed from house walls before they have a chance to spin cocoons. White Marked Tussock Moth and ELM Leaf Beetle by Felt Ephraim Porter from. However, this may not be that effective as small larvae can easily be blown into cleared areas during the spring. However, to prevent serious aesthetic damage to ornamental and Christmas trees, it is occasionally necessary to control smaller larvae using insecticides.Ĭocoons with attached egg masses can be removed from ornamental shrubs during the winter. Control is usually not required as outbreaks are commonly local and brought under control by natural factors.