One of these is yarrow, but yarrow is a perennial weed that has a creeping rhizome system underground, whereas Onehunga weed has fairly shallow fibrous root system. Yarrow has many more leaflets per ...

Galls are also generally much larger than nodules. Severely affected root systems are often swollen ... Table 1. List of common crop and weed host species for M. incognita in Delaware. Rotating ...