1 / 10

Robert Woolley Dave Wilson Nursery Hickman, CA

Robert Woolley Dave Wilson Nursery Hickman, CA. growers of deciduous fruit, nut & shade trees for commercial growers & the home garden. Dave Wilson Nursery. primarily field-grown, trees sold bareroot some stock grown in containers 1 to 2 years in ground zero tolerance for nematodes.

marius
Download Presentation

Robert Woolley Dave Wilson Nursery Hickman, CA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Robert WoolleyDave Wilson NurseryHickman, CA growers of deciduous fruit, nut & shade trees for commercial growers & the home garden

  2. Dave Wilson Nursery • primarily field-grown, trees sold bareroot • some stock grown in containers • 1 to 2 years in ground • zero tolerance for nematodes

  3. Dave Wilson Nursery trees sold to commercial growers must be produced under CA Dept of Food & Agriculture (CDFA) Nematode Certification Program CDFA’s Nematode Certification Program requires soil treatment or nematode sampling soil treatment must eliminate nematodes to 4 to 5 feet deep, for 1 to 2 years

  4. 3 soil treatments used in CA for control of nematodes in field grown deciduous trees: • methyl bromide with chloropicrin • Telone II (1,3-dicholoropropene) • Vapam (metam sodium)

  5. methyl bromide • only soil treatment effective in “heavy” soils • only nematicide in general use that also effectively controls weeds • granted limited use in CA nurseries by Montreal Protocol, under QPS exemption • rates of chloropicrin from odorant to as high as 33% (strawberries up to 50% “pic”) • a “biocide”, so it disrupts soil ecology

  6. Telone II • approx 95% of CA tree nursery Telone II treatments are done under tarp--tarping may provide some weed control • use limited by “township caps” • 30 days (minimum) to plant back • putatively more benign to soil ecology than methyl bromide

  7. Vapam • requires water as carrier to target pest, but sprinkler application limited as it’s highly volatile • drip application impractical in nurseries • very limited use with Telone II due to cumbersome application rig

  8. non-chemical alternatives crop rotation and/or extended fallow -maybe OK--limited by time required mechanical (super-heated water/steam) -questionable efficacy & cost? Star Wars devices -cost? & soil ecology concerns

  9. other “alternatives” methyl iodide -little to no interest due to phytotoxicity propargyl bromide -tends to explode Nemacur, Vydate & Furidan (sp?) -registered for use in CA via drip but not used due to impracticality brassicas & other veges -insufficient nematode kill -impractical

  10. next steps? • plant breeding for immunity • -very long term but important to • pursue • novel approaches to killing nematodes and controlling weeds & disease -new chemicals? -genomics? • Grow trees solely in containers -the ultimate solution?

More Related