Organic Pesticides

January 11, 2011

Joe DeFrancesco

Oregon State University

Organic Pesticides

I.! IR-4 BioPesticide Program

II. Search function for organic products

III. Organic Herbicide Efficacy

IV.! Acetic acid registration

V.! SWD Management

VI. Resource Guide

What is IR-4?

IR-4 Mission and Structure

Commodity Liaison Committee (CLC)

Specialty Crops

IR-4 Searchable

Products Database

http://ir4.rutgers.edu/Biopesticides/LabelDatabase/

index.cfm

or

http://ir4.rutgers.edu (home page)

Check

box for

organic

products

only

Choose state

Click to search by a.i. or product

http://www.omri.org/omri-lists

Check website for organic status

Organic Herbicides

Post-emerge (contact)

–!Racer (sodium nonanoate; salt of fatty acid)

–!Natures Avenger (citrus oil)

–!Oregano oil (OSU-liverwort trials)

–!Acetic Acid (20%)

Pre-emerge (prevents seed germination)

–!Corn gluten meal

Broadleaf Weed Control (shepherds purse, purslane, hairy nightshade)

•! Racer –! CA: 88%

–! ND: 11%

•! Acetic Acid (20%) –! ND: 6% –! OR: 90+%

•! Natures Avenger –! CA: 84%

–! OR: 80%-98%

•! Oregano Oil (2%)

–! OR: 80% (liverwort)

•! Corn Gluten Meal –! ND: 0%

Weed Pharm Acetic Acid Herbicide

•! 20% concentration

•! Food-grade acetic acid

•! Only acetic acid product approved as an

herbicide for use in food crops

SWD Management

•! When to take action? –! SWD appear in traps and the presence of vulnerable

fruits (color)

–! Follow up applications based on subsequent trap captures, product persistence, environmental conditions and irrigation practices.

•! How to take action? –! Complete coverage of the canopy is important –! SWD most active in early AM and at dusk

–! Rotate chemical classes to delay resistance development

–! The label is the law

–! Be cognizant of REI, PHI, MRL!s for your target markets

–! Protect pollinators http://extension.oregonstate.edu/catalog/pdf/pnw/pnw591.pdf

–! Materials to consider!.

Pesticides

•! Organic Products –! Spinosyns (Entrust) ~5-7 days residual control

•! GF-120 is not effective against SWD

–! Pyrethrum (Pyganic) active against adults but has no residual activity

–! Oils are generally effective against adults but have no residual control – Often removes waxy bloom on fruit & causes spotting

–! Aza-Direct is not an effective adulticide

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Cultural Tools

1.! Timely Harvest •! Harvest fruit when ripe to limit exposure to SWD

•! Shorten harvest interval

2.! Field Border Management •! Unmanaged field edges and adjacent host crops

•! Mixed small fruit plantings are more susceptible

•! Wild blackberries may be a confounding factor

3.! Mass Trapping* •! Removing adults may minimize damage

4.! Sanitation* •! Disposal of infested fruit

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•! Successfully used in China at 60-100 traps/acre (Wu et al.

2007)

•! Traps must be more attractive than fruit to be successful •! Trap before SWD lay eggs or overwinter

•! Research being performed in Willamette Valley in no-spray U-pick Blueberries with history of SWD

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How about biological control?

–! Lab studies showed 12-68% suppression of SWD

–! Affect egg/larval stage of

SWD •! ;87*.*/$.)")-*%+*/-$6"+A$*76#-%#/$

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•! P+"#*97$#:.2+")?+7$.2)77#/$$

•! Q+79F%#"A$9+)2$%+$@C$7)%,")2$#7#A*#-$%+$"#/,(#$B1C$

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Where to go for Information?

•! OSU SWD Website -

http://swd.hort.oregonstate.edu/

•! Northwest Berry and Grape Information Network - http://berrygrape.org/

•! Peerbolt Crop Management -

http://www.peerbolt.com/swd/

•! UC IPM Website - http://www.ipm.ucdavis.edu/IPMPROJECT/workshop-spottedwing_drosophila.html

•! WSU SWD Website - http://www.mountvernon.wsu.edu/ENTOMOLOGY/pests/SWD.html

Resource Guide for Organic Insect

and Disease Management

Published by Cornell University

Cultural information and management

practices

Organic materials fact sheets

Appendices: plant resistance, trap cropping,

habitats for beneficials, other resources

Web site: http://www.nysaes.cornell.edu

Thank You