# The interaction of Typhlodromus pyri (Scheuten) and Panonychus ulmi (Koch) (Acari) on apple trees in Nelson, New Zealand

> 1978 master's thesis by J. T. S. Walker at University of Canterbury

**Wikidata**: [Q112840487](https://www.wikidata.org/wiki/Q112840487)  
**Source**: https://4ort.xyz/entity/the-interaction-of-typhlodromus-pyri-scheuten-and-panonychus-ulmi-koch-acari-on-apple-trees-in-nelson-new-zealand


## References

1. [Source](https://hdl.handle.net/10182/4333)