Field grown nursery stock production system
A Brief Overview of the Perennial Crop Nursery Production System in California
Although details vary somewhat among crops and growers, open field production of perennial crop nursery stock in California is typically a 3-to 5-yr cycle that begins with field preparation and preplant soil fumigation the summer before the nursery crop is established.
Fumigation: If a nursery crop, an orchard or vineyard crop, or other nematode or pathogen-hosting crop has been grown in the field, most fruit and nut tree nurseries, garden rose nurseries, and grapevine nurseries are fumigated in the summer or fall prior to planting the nursery stock (see section on Importance of Fumigation).
Goals of Nursery Field Production
- Remove old crop roots that may harbor plant parasitic nematodes or pathogens
- Fracture hard soil layers that may limit fumigant movement or root exploration
- Dry subsurface soils (moist soil can limit fumigant distribution)
- Destroy soil clods that may resist fumigant penetration and harbor pests
- Raise surface moisture to hydrate pest reproductive structures (weed seed, pathogen spores, nematode juveniles and eggs), encourage weed seed germination, and reduce rapid emission of fumigants following application.