1. UC IPM
Reduction in growth and bulb size of onion (left) caused by stubby root nematode, <i>Paratrichodorus</i> spp., feeding.
Reduction in growth and bulb size of onion (left) caused by stubby root nematode, Paratrichodorus spp., feeding.
Credit: Howard F. Schwartz, Colorado State University, Bugwood.org