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Plant and Insect Diagnostic Clinic Plant Nematode Sample Submission Form
Download and use this form when submitting soil samples for nematode identification and counts.

This form is for soybean cyst nematode egg counts, nematodes on corn, turfgrass nematodes, nematodes found in vegetable or fruit crop fields, as well as home gardens. Also includes instructions on collecting and shipping plant and soil samples for nematode analysis at the ISU Plant and Insect Diagnostic Clinic.
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Evaluation of Soybean Varieties Resistant to Soybean Cyst Nematode in Iowa - 2016
Use of resistant soybean varieties is a very effective strategy for managing soybean cyst nematode (SCN). Numerous SCN-resistant soybean varieties are available for Iowa soybean growers. This report provides details by Iowa State University personnel who evaluate varieties each year.
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Soybean cyst nematode-resistant soybean varieties for Iowa
Details on selecting and managing soybean cyst nematode-resistant varieties.
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Soybean Cyst Nematode Field Guide
Soybean cyst nematode is the most economically significant pest of soybeans in Iowa and has been found in 98 of the 99 Iowa counties. Infested soybean plants often show no symptoms other than reduced yield. The 62-page field guide is designed as a resource for agronomists and farmers to manage soybean cyst nematode.
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Soybean Cyst Nematode (SCN) Management Recommendations -- Iowa State University Plant and Insect Diagnostic Clinic
April 2008 revision of soybean cyst nematode management recommendations.
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Interpreting SCN Soil Sample Results - Important Points to Consider
This publication answers several questions that may be asked to help interpret soil sample results. Topics include how to relate sample results to management options, why follow-up greenhouse tests are necessary for samples with low SCN egg counts, and what a negative SCN test result means.
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Soybean Cyst Nematode
Learn about symptoms, life cycle, spreading, and management of soybean cyst nematode (SCN), a parasitic roundworm that attacks soybean roots.
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