Pacific Northwest & Coastal California Zone
Nematodes Nematodes are a growing but often undetected pest problem in turfgrass throughout the United States, especially on low-mowed greens or other areas under stress. Nematodes often enhance root diseases confounding diagnosis and control. Nematodes are also expanding in the PNW, and are complex including stem and crown nematodes ( Anguina ) as well as root-infecting nematodes like root knot. Root-infecting nematodes in the PNW can become problematic in January-March as well as late summer, both periods of lowest growth potential in greens. Nematode assays can help determine the type of nematode present and whether they are a concern. If current symptoms are validated with high nematode populations, curative applications of Indemnify should be made immediately. Consult your local area sales manager for specific timing and re-application interval. Re-applications will depend on the level of nematode populations/ damage. For courses where nematodes are not a major concern but wanting to be proactive with nematode management, apply Resilia TM root health solution at 4 fl. oz. per 1,000 sq. ft. A total of four applications can be made per year. For resistance management, consider including other MOAs for nematode control. For courses with a documented history of nematode damage, consider the following:
Application
Product and Use Rate per 1,000 sq. ft.
Cool-season turf – root infecting nematodes
January - May 1st app. - Jan - Apr prior to expected symptom expression
Indemnify ® 0.39 fl. oz.
Fall
1st app. - July- Oct prior to expected symptom expression
Indemnify 0.39 fl. oz.
Poa annua – Anguina pacificae nematodes
Spring
1 st app. – Feb/Mar (7-14 days before aerification)
Indemnify 0.39 fl. oz.
Fall
1 s t app. –Sep/Oct (7-14 days before aerification)
Indemnify 0.39 fl. oz.
Consult your local area sales manager for specific timing and re-application interval. Re-applications will depend on the level of nematode populations/damage
PRO TIP : If root-knot nematodes are suspected, request mist extraction, whereas sting nematodes are more accurately determined using traditional soil extraction techniques
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