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UCCE Ventura County- Blogs
Drones in Avocado Orchards?
How have drones been used in Avocado production? What works? What might work? And what needs to be figured out?
Come listen to a zoom with those who have actually used drones and how they might be applied. It's coming up July 16!!!!
Register for this zoom sponsored by the California Avocado Society at:
https://californiaavocadosociety.org/seminars.html
cas drone 2024
Citricola Scale in the Big Valley
Sandipa Gautam, Area Citrus IPM Advisor serving Kern, Tulare, Fresno, and Madera counties has been maintaining a web page on the Lindcove Website Citrus IPM - Lindcove Research and Extension Center (ucanr.edu). Within this page, she writes a blog on pest issues that are problem for growers in the SJV region. For subscribing, click https://ucanr.edu/blogs/IPMBlog/ and enter your email address. You will receive an email to confirm subscription, follow the instructions to complete subscription. Every time a post is made you will receive and email notification. This page also hosts pest memos of this season and archives from the previous season along with links to Citrus related extension posts, newsletters.
Within the Citrus IPM tab, you will also find Degree Days, which is regularly updated for California red scale for four counties in the SJV. If you are in Ventura county or other citrus growing counties (not in the valley) and California red scale is a pest you manage and are interested in Degree Day calculation and predictions, please contact sangautam@Ucanr.edu .
If you would like to receive emails on pest memos/other events, please send an email to sangautam@ucanr.edu to be added to her email list.
citricola scale blog
Californina Red Scale News
Read all about Sandipa Gautam's Central Valley research and what chemicals are working. There was trouble loading the file,but you go to the bottom and click on "Attached File" You'll the wonderful work she is doing.
LinkstoPesticidetrialsonCRS
- CRStrial 2015
- CRStrial 2016
- CRStrial 2017
- CRStrial 2018
- CRStrial 2019
- CRSTrial2022
- CRSTrial2023Trial-1
- CRSTrial2023Trial-2
red scale feeding on grapefruit
CRS July Memo Page 1
CRS July Memo Page 2
CRS July Memo Page 3
Cherimoya Manual Online
Back in the early 1990s the California Cherimoya Association decided to put together all their knowledge about the fruit and plant - from history to pollination and costs of production. There are numerous authors who are steeped in love of the fruit. It took several years to bring this all together. finalizing in 1995. It was only available to members of the Association, but now it's available on-line. If you make citation to this work, please recognize the CCA for all the effort that went into it, as well as the individual authors. This is the definitive work on California cherimoyas.
https://ceventura.ucanr.edu/Com_Ag/Subtropical/Minor_Subtropicals/TEST_1_/
Book 1: CCA Cherimoya Growers Handbook - Digital Version (PDF)
Chapter 1: History - Art Schroeder
Chapter 2: Botany - Art Schroeder
Chapter 3: Cultivars - Norm Ellstrand
Chapter 4: Propagation - Rob Brokaw
Chapter 5: Soil Fertility Management - Ben Faber
Chapter 6: Irrigation Management - Ben Faber
Chapter 7: Pruning and Training - Scott Van Der Kar
Chapter 8: Pollination - Theory and Practice - Tracy Kahn
Chapter 9: Insect Pest and Disease - Gary Bender
Chapter 10: Postharvest Handling - Mary Lu Arpaia
Chapter 11: Marketing - Peter Nichols
Chapter 12: Costs of Production - Claude Sweet
cherimoya
New Weed Control Method
- Posted by: Gale Perez
Sterile Pollen Technique Shows Promise for Palmer Amaranth Weed Control
Newly published research provides a novel and sustainable weed-management strategy
WESTMINSTER, Colorado – 22 May2024 – Recently published research in the journal Weed Science shows that a sterilization technique commonly used to control insect pests can be modified to control weeds that require pollination to reproduce. More specifically, the researchers determined that employing a sterile pollen technique (SPT) could effectively disrupt Palmer amaranth (Amaranthus palmeri S.) reproduction.
Palmer amaranth remains among the most detrimental weeds in North American agriculture, and its resistance to several herbicide groups makes its control a serious challenge. Yet, researchers in this study were able to find a promising new control method for Palmer amaranth and possibly for many other difficult-to-control weeds.
“Our results indicate that SPT, using irradiated pollen, can be a valuable approach for reducing weed-seed production,” says Mohsen B. Mesgaran, Ph.D., a plant sciences assistant professor at the University of California Davis, and the article's corresponding author. “SPT also holds potential for broad-spectrum weed control by mixing sterile pollen from multiple weed species in a single application.”
Additionally, the researchers found that SPT shows promise for managing troublesome herbicide-resistant weeds that have survived in-season control efforts.“We observed the greatest reduction in seed set when irradiated pollen was introduced to the stigma through artificial pollination prior to open pollination,” notes Mesgaran. “It appears that irradiated pollen exerts a preventive effect on naturally occurring pollen that arrives later.”
While the researchers determined that a dose of 300 units of ionizing radiation (Gy) strikes the optimal balance to achieve both efficient Palmer amaranth pollination and seed sterility, challenges still remain. For example, irradiated pollen is currently less competitive than naturally occurring pollen. Thus, field managers may need to employ additional measures to successfully control Palmer amaranth with SPT, such as dispersing irradiated pollen in the field before male anthesis and releasing it multiple times.
More information about SPT and Palmer amaranth control can be found in the article (by Wenzhuo Wu and Mohsen B. Mesgaran), “Exploring sterile pollen technique as a novel tool for management of Palmer amaranth (Amaranthus palmeri).” The research is featured in Volume 72, Issue 3 of Weed Science, a Weed Science Society of America journal, published online by Cambridge University Press.
Original source: Weed Science Society of America (https://wssa.net/2024/05/sterile-pollen-technique-shows-promise-for-palmer-amaranth-weed-control/)
palmer amaranth