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Thursday
Jan262017

second application rules for Korea and China

California Citrus Exporters,

 

The California Citrus Quality Council (CCQC) is providing new information on how to comply with Korean and Chinese protocols regarding copper applications.

 

Significant rainfall in most growing regions has made it difficult for growers to make copper applications in compliance with the Korea and China protocols.  We are sending updated information that provides greater latitude for growers to make required treatments while maintaining compliance with the Korea and China protocols.

 

Korea (Septoria Spot)

 

The second copper application for control of Septoria Spot is due by Feb. 4.  Since rainfall has made it difficult for growers to make airblast applications of copper for Septoria Spot control, growers can still make the Feb. 4 deadline if growers make an aerial application of Quadris Top® (azoxystrobin/difenoconazole).  UC Riverside’s Jim Adaskaveg suggests the application be made by helicopter and that the pilots make the application at the slowest possible speed with the greatest amount of water possible.  These factors will improve efficacy.  There are MRLs for Quadris Top® in most major export markets.  Included below are MRLs for some major markets in case fruit must be diverted to another market besides Korea.

 

Additionally, we recommend that packinghouses and growers monitor groves for ice marks and submit samples to the NAVEK lab to screen for Septoria Spot infections.

 

Market

Active Ingredient

Published Commodity

Index Commodity

MRL (ppm)

Australia

Azoxystrobin

Citrus Fruits  

Orange, sweet

10

Canada

Azoxystrobin

Oranges

Orange, sweet

15

Codex

Azoxystrobin

Citrus fruits

Orange, sweet

15

Japan

Azoxystrobin

Orange (including navel orange)

Orange, sweet

10

Korea

Azoxystrobin

Citrus Fruits

Orange, sweet

10

United States

Azoxystrobin

Fruit, citrus, group 10-10

Orange, sweet

15

Canada

Difenoconazole

Oranges

Orange, sweet

0.8

Codex

Difenoconazole

Citrus fruits

Orange, sweet

0.6

Japan

Difenoconazole

Orange (including navel orange)

Orange, sweet

0.6

Korea

Difenoconazole

Citrus Fruits

Orange, sweet

0.6

United States

Difenoconazole

Fruit, citrus, group 10-10

Orange, sweet

0.6

 

China (Phytophthora)

 

Given the climatic conditions this season, the deadline for the second copper application for Navel and Valencia oranges in the San Joaquin Valley and southern California will be on Feb. 4.  The deadline for the first application of copper for early-season Valencia oranges grown in the desert region (Imperial County and Eastern Riverside and San Bernardino Counties) is Feb. 21.

 

Due to the frequency and volume of rainfall in the San Joaquin Valley and Southern California many growers have not been able get equipment into groves to make copper applications, so a significant amount of navel and Valencia orange acreage may not meet the China protocol deadlines.

 

APHIS has agreed to provide packers and growers additional options to comply with the protocol and still qualify shipments for export to China if certain additional conditions are met.

 

Valencia Oranges

 

Imperial County and Eastern Riverside and San Bernardino Counties (Expected harvest dates – Feb through April)

  • Copper applications must be made by Feb. 21.  There is likely to be sufficient time to make applications in this region, so no additional options are required at this time.

 

San Joaquin Valley and Southern California (Expected harvest dates – May through September)

  • Other measures in the China protocol must still be followed, such as skirt pruning, harvesting fruit above 20 inches and monitoring groves for disease one week prior to harvest at recommended threshold values for Tulare (0 diseased fruit/A) and other citrus-producing counties (<5 diseased fruit/A).

 

Navel Oranges

 

San Joaquin Valley and Southern California

  • Growers that are unable to make applications by the Feb. 4 deadline have the option to delay copper applications until Feb. 18.  However, if the copper application is delayed, exporting fruit to China from that grove must be delayed for 30 days from the date of the copper application.
  • Growers and packers that choose this option are also encouraged to monitor groves prior to harvest to assess the efficacy of the copper treatment and to avoid export of fruit from groves that exceed the Phytophthora threshold of Tulare (0 diseased fruit/A) and other citrus-producing counties (<5 diseased fruit/A).
  • A 30-day delay in harvesting would allow infections to develop and fall from the tree prior to harvest.
  • All other measures in the China protocol must be followed.

 

Please contact me by telephone at (530) 885-1894 or via e-mail jcranney@ccqc.org at if you have questions or need additional information.

 

Regards,

Jim

 

California Citrus Quality Council

853 Lincoln Way, Suite 206

Auburn, CA 95603

Tel:  (530) 885-1894

Fax: (530) 885-1546

James R. Cranney, President: jcranney@ccqc.org

Carleen Price, Executive Assistant: cprice@ccqc.org

www.ccqc.org

 

 

 

 

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