Landscape Management, April 2012
LANDSCAPEMANAGEMENT NET APRIL 2012 16 PHOTOS BY ISTOCK INTERNATIONAL INC emergence often online Extension offices also can help you identify the phenological indicators of when to treat for common pests For example in New England treatments for winter moth are applied when forsythia blooms As the season continues if temperatures rise rapidly and stay elevated expect overlap in insect emergences That means treating for a number of pests early Researchers have forecasted that areas with dry climates are likely to become drier and wet areas wetter Dry regions like Texas and the West can expect increased pressures from pine bark beetles and Ips beetles which attack drought stressed stands of trees Pine sawyer beetles attack stressed trees and vector pine wilt Mites more active in hot dry weather damage evergreens Wet areas such as the Northeast and Florida on the other hand can expect an increase in foliar diseases such as anthracnose and insects such as whiteflies In the upper Midwest elm bark beetles can transmit Dutch Elm Disease Expect earlier beetle flight and earlier DED applications Many species of scale insects that infest trees and shrubs are most susceptible to treatment at the crawler stage Crawler emergence and new leaf development usually are coordinated Though hemlock trees develop later than many hardwoods expect an early push of foliage this year Treatment for elongate hemlock scale for example should be made earlier To manage all of this check weather conditions and anticipate having to apply treatments early Read all label instructions and dilution rates Lastly inject trees when soils are moist and have warmed in spring In summer inject trees early in the morning when conditions are cooler In dry conditions water your trees before treating them Whatever the weather by planning properly this season we can prevail LM The author is an ISA certified arborist and plant health care specialist with Arborjet and has more than 30 years experience in the horticultural and arboricultural field BUG OFF continued from page 14 The mild winter weve had is likely to bring higher populations of pests such as emerald ash borers left and whiteflies right
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