Posts Tagged: scouting
ACP Scouting and Monitoring Workshop for Growers in Riverside County
The University of California Cooperative Extension is hosting free workshops for citrus grove owners, managers and farmers. The workshop will provide an overview of proper Asian citrus psyllid (ACP) scouting techniques from University of California research entomologists Dr. Monique Rivera. Attendees will have the opportunity to practice psyllid scouting techniques in blocks of trees known to host ACP.
- No cost to attend this event
- Strongly encouraged to bring a hand lens (a loaner hand lens will be provided if needed).
- 1.5 of “other” DPR Continuing Education Hours will be given.
- Further details on workshop location will be provided to registrants by email 48 hours prior to the event.
Space is limited, please register at: http://ucanr.edu/survey/survey.cfm?surveynumber=25658
October 2, 2018, 9-11 AM
If you have any questions, please contact:
Sonia Rios
951-683-6491 EXT 224
ACP Scouting and Monitoring Workshop for Growers in Riverside County
ACP Scouting and Monitoring Workshop for Growers in Riverside County The University of California...
Dealing with Diamondback Moth
It has been a couple of “rough” weeks managing the diamondback moth (DBM), Plutella xylostella (Lepidoptera: Plutellidae), in the Central Coast. Based on my conversations with some PCAs, we are managing large populations of this moth, resulting in high infestations in cole crops like broccoli and Brussel sprouts. Larvae of this insect will typically feed on the underside of the leaves, rasping the epidermis and generating this characteristic “window panning” that results on perforations later on (Fig. 1). Diamondback larvae will also feed on the plant's growing points, floral stalks, and even on flower buds.
It seems like populations have been building up during early summer in our area, resulting in enough individuals, at this point, generating significant injury in cole crops. PCAs have been recommending spraying several different insecticides to reduce the infesting populations in affected fields, since damage has been beyond tolerable. For instance, after one of my field visits, I was able to spot affected larvae in treated fields (Fig. 2). Treatments are working, I believe we need to continue being ahead of future DMB infestations.
Some information to consider:
- Scout early. If you have transplants or direct seeded seedlings, pay a visit more often. We are dealing with a large DBM population right now. There will be a high chance that those fields may ended having DMB earlier than expected during this time of the year.
- Use of adjuvants. The waxy nature of cole crop leaves represents a challenge for insecticide deposition in the canopy. Make sure that you are using a spreader/sticker adjuvant to potentially reduce any pesticide “sliding off” from the waxy leaves.
- Rotate pesticides. Consider using different classes of insecticides, before using different active ingredients within the same class. For instance, using an avermectin and then a diamide, instead of using chlorantraniliprole and cyantraniliprole (two different active ingredients within the diamide class) back to back. Using different modes of actions will help to delay potential issues of developing insecticide resistance in our DBM populations.
Learn to Scout ACP
UC to conduct ACP scouting workshops Registration is now open for Asian citrus psyllid scouting workshops to be conducted in Fillmore and Moorpark on July 13. Intended for grove owners, managers or farm employees, the sessions will provide instruction in ACP population monitoring as a way of improving the area-wide management (AWM) strategy in Ventura County.
At each workshop, University of California research entomologist Beth Grafton-Cardwell will provide an overview of proper scouting techniques, which participants will have the opportunity to practice in blocks of trees known to host ACP. Participants are asked to bring a hand lens (a loaner hand lens will be provided if you do not have one).
The workshops are free, but participation in each is limited to 25 people and advance online registration is required.
Session 1 10 a.m. to noon in Fillmore. Register at https://acp-fillmore.eventbrite.com.
Session 2 1:30 to 3:30 p.m. in Moorpark. Register at https://acp-moorpark.eventbrite.com.
Registered participants will receive details about the physical location of each workshop by email 48 hours before the event.
Science For Citrus Health Interested in the research addressing Huanglongbing (HLB) disease? Check out the University of California website with the latest information. The site also has fact sheets, Powerpoint slides, and pictures that can be used for general outreach and presentation.
2018-2019 Area-wide treatments start soon for Ventura County The next round of coordinated AWM treatments begin in mid-July, and reminders for the first ACP treatment window have been sent. If you did not receive a reminder, do not receive ACP email blasts, or need pest control/tree removal referrals, please contact your grower liaisons Sandra Zwaal and Cressida Silvers. Please remember to file Pesticide Use Reports (PURs) electronically and on a timely basis. Manually filed PURs can take months for recognition as an ACP treatment. For a no-cost CalAgPermits account to file electronically and for training, contact the Agricultural Commissioner's Office.
As of June 29, the total number of trees confirmed as infected by HLB had risen to 676. None were found in commercial groves. The HLB quarantine boundaries and the latest tally of HLB confirmations, updated weekly, is available online at https://citrusinsider.org/maps/. As confirmations increase and spread closer to commercial citrus, it is a good time to consider removing citrus trees not worth the resources required to protect them from ACP and HLB.
Meetings and resources The Citrus Pest and Disease Prevention Committee will meet July 11 in Visalia. Attendance is free. Here is a link to the CDFA site with agenda, venue, and webinar information: https://www.cdfa.ca.gov/citruscommittee/
University of California ACP Areawide materials list and ACP monitoring protocols Movement of bulk citrus materials list Ventura County ACP-HLB Task Force mailing list signup
Feel free to contact your grower liaisons if you have questions.
Sandra Zwaal (949) 636-7089
Cressida Silvers (805) 284-3310 |
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ACP traps
Bagrada bug update
We have been scouting for Bagrada bug on wild host plants at two sites in the San Ardo area since middle of May. We selected San Ardo as our most southern scouting point for the Salinas Valley. Every other week, we have performed plant visual counts and collected yellow sticky cards to document the presence of these bugs. So far, we have not found any Bagrada bug in the San Ardo area.
Four additional sites, along Highway 101, were added today to the Bagrada bug scouting route. These sites, from south to north, are located: 1) near King City, 2) south of Greenfield, 3) south of Soledad, and 4) north of Soledad. Today, we were able to document the presence of Bagrada bug adults (Fig. 1), on shortpod mustard (Fig. 2), in two of the four additional scouting sites. Bagrada bug adults are currently located north of Soledad and near King City. From our observations, there are no nymphs nor eggs on the shortpod mustard. Adults were observed mostly mating. Early instar nymphs will be expected in the next couple of weeks.
We will be increasing the frequency of the scouting for this bug to weekly visits, and we will be adding two additional sites near Gonzales, one in Chualar, and another one south of Salinas. Adding more sites will help to document if Bagrada bugs are present in other places besides Soledad and King City. Are these bugs isolated and resident Bagrada populations? We plan to answer this question setting up more scouting sites across the Salinas Valley.
Today, we also noticed that the most of the shortpod mustard plants are senescing. It would be expected that Bagrada bug females might disperse from unsuitable wild host plants to recently planted cole crops in the surrounding areas. Dispersing and mated females may lay their eggs on these crops. I would suggest to PCAs to check recently planted or young cole crops in the surrounding areas of Soledad and King City during this week. Early detection of potentially migrating females will help everybody to successfully manage this pest.
We will continue to visit our scouting sites for Bagrada bug in the Salinas Valley. If you have any further question about the situation of this pest in your area, please call or email Alejandro Del-Pozo at 831-759-7359 or adelpozo@ucanr.edu.