Facebook
X (Twitter)
Reddit
Pinterest
Tumblr
LinkedInPosts Tagged: light brown apple moth
High LBAM detections in Monterey Bay, Growers Advised Again to Control Leafrollers
Growers and pest control advisors on the Central Coast should be alerted to the gravity of the current leafroller situation. Owing to a warm winter, large numbers of leafrollers, including light brown apple moth (LBAM), have been observed throughout the Monterey Bay area.
Berry growers need to be diligent in using best pest management practices for leafrollers (given in other posts on this blog as well as the UC IPM website) right now to prevent additional field shutdowns and regulatory scrutiny. The issue is particularly important for organic berry fields where worm control tactics are limited.
This is a very big deal, because the USDA – CDFA regulatory effort is still in full swing. If LBAM is detected in a shipment, it could very well result in field closure for a long period of time, handing eye watering losses to the grower. Very much worth paying attention to the matter of LBAM on the Central Coast.
In the way of review, growers shipping should have a compliance agreement issued to them by the County Agricultural Commissioner. Harvested fruit is inspected on a monthly basis at the cooler, and if a suspect LBAM larva is found, the shipment is held up. An investigation is launched during this time to confirm whether the larva is actually an LBAM. During this time, no fruit may be moved from the field that was the source of the lot. Results may take days to get back, and if it is confirmed to be LBAM by DNA laboratory analysis the USDA- CDFA people will visit the grower for an inspection of the block or field where the larva was found. It is very important to note that while the grower is waiting for results to get back on a suspect larva, he or she should be very active in cleaning up the field - pre-emptively treating with insecticides and removing leaf rolls.
If on inspection more larvae are found in the field (they don't miss many, your threshold of detection is very low), the field is shut down for shipment outside the area of quarantine, and regulatory sprays must be done and need to be repeated until inspections find ZERO suspect LBAM larvae in the field. Regulatory sprays have to be witnessed by USDA or CDFA personnel. The whole process can take a month or longer, when one figures in delays, shortage of inspection personnel and mandated limits on work hours for state and Federal employees.
Further elaboration on the inspection protocol can be found here:
//ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=4993
Compliance agreements issued to growers require weekly inspections (every seven days) for LBAM of the production field by a PCA or qualified scout. If this weekly scouting is not done or records of it not kept, a grower having a positive LBAM find (starting 30 days to harvest for export to British Columbia, Canada) will be in violation of the compliance agreement. This will result in the compliance agreement rescinded (ie taken away) and the possibility of a hefty fine.
PCA's are busy professionals, and sometimes the weather doesn't comply it might be difficult for them to get to the field every seven days. That's why it is so important for the grower to have qualified scouts on the farm doing weekly LBAM inspections (they are not difficult). Mark has held a number of trainings already, and will hold two more trainings; one in English on May 28 at 8 am at the UCCE office, 1430 Freedom Boulevard, Suite E (same office as before) and another on May 29 in Spanish at 8 am at the same location. The trainings aren't long, tops maybe an hour after which each participant will receive a signed certificate of participation. If you need help with management of leafrollers right now, you can contact Mark (mpbolda@ucanr.edu), or Hillary (hthomas@calstrawberry.org), directly to provide additional resources or to consult with you on the site specific issue, risk factors, and management options.
In short, yes, it's important to pay attention to leafrollers in your fields this year. Additional information in English and Spanish is included in this Green Sheet from the Commission that went out on February 18, 2015:
http://reports.calstrawberry.org/Reports/Green%20Sheets/02.18.2015_LBAM%20Advisory.pdf
Classic LBAM, lots of webbing on leaf to the left, larva nestled under the calyx of the fruit.
Importance of Scouting for Light Brown Apple Moth
The Light Brown Apple Moth (LBAM) is present in urban and natural areas of the county, and can easily migrate into agricultural fields. British Columbia, Canada has zero tolerance for LBAM in shipments of plants and harvested crops. Growers whose fruit will be shipped to British Columbia, Canada must sign a Compliance Agreement with the Agricultural Commissioner. One of the critical elements of that Compliance Agreement is visual field scouting for the LBAM.
Visual Field Scouting Requirements:
- Must begin at least 30 days prior to harvesting fruit for export to British Columbia, Canada.
- Must be performed weekly during the harvest season.
- Written records of the scouting must be kept by the grower.
- The scouting must be done by a licensed Pest Control Advisor (PCA) OR an “approved scout”.
Approved Scout:
- A licensed PCA is an approved scout.
- Growers provide the Agricultural Commissioner with the name of their PCA, who will do the weekly scouting.
- The PCA may be unable to perform the required weekly scouting for the grower, due to weather, a recent pesticide application, or simply because he or she is too busy.
- It may be helpful for growers to assign alternate qualified “approved scouts” to ensure the scouting is performed and recorded on a weekly basis.
- Mark Bolda, UCCE Caneberry and Strawberry Advisor, can provide training and an “Approved Scout” certificate to those who attend the training. Mark is holding trainings in May.
- Approved Scout trainings are scheduled to be given at the UCCE Auditorium, 1432 Freedom Boulevard in Watsonville
o May 28 will be in English – 3PM to 4 PM
o May 29 will be in Spanish – 3 PM to 4 PM
Importance:
- Canada is our county's largest trading partner.
- Serious consequences will result if LBAM is intercepted by Canadian officials on a shipment.
- The grower's records will be examined; if the grower has not complied with the terms of the Compliance Agreement, fines can be levied on the grower.
- The entire industry will be affected. Canada could refuse to accept harvested fruit from the County of Santa Cruz or the State of California. This would cause a drop in price received for all growers due to the extra supply of berries in the market.
Of Medflies and Light Brown Apple Moths
Congratulations to James R. Carey, distinguished professor of entomology at the UC Davis Department...
UC Davis Distinguished Professor James R. Carey with some of the maps he used in his research. (Photo by Kathy Keatley Garvey)
Announcing Trainings for Light Brown Apple Moth Approved Scout Certification
UCCE Farm Advisor Mark Bolda will be providing a training on light brown apple moth (LBAM) that qualifies attendees to be an “approved scout” relating to the Compliance Agreement for shipment of berries to Canada. On completion of the brief training, attendees will receive a Certificate as a record of their participation.
This training will be held once in English and once in Spanish.
Where: UCCE Auditorium, 1432 Freedom Boulevard, Watsonville, CA
When: March 4 – 8:00-9:00 AM in English
March 5 – 8:00-9:00 AM in Spanish
No pre-registration necessary. All are welcome to attend, even if they do not intend to ship berries to Canada.
No continuing education hours will be offered at this meeting.
Please call Mark at (831) 763 8025 if you have any questions.
Light brown apple moth or look-alike?
Nursery workers are the first line of defense in detecting light brown apple moth when growing...
