Larry Schwankl was born July 11, 1953, to Margaret and Orville Schwankl in Mankato, MN, and died May 2, 2022, Visalia, CA, from complications due to cancer. He graduated from Mankato High School and attended Mankato State for two years before transferring to Iowa State University for a degree in civil engineering. After earning his Masters from the University of California-Davis he worked for FEMA in Philadelphia on flood control issues. He returned to UC Davis and obtained his Ph.D. after which he was hired as a University of California Cooperative Specialist affiliated with the UC Davis Department of Land, Air, and Water Resources Department. During his career he worked with growers and industry on sprinkler, drip, and flood irrigation management. In 2004 he married Carol Frate of Visalia, CA, and transferred to the University's Kearney Agricultural Research and Extension Center near Parlier, CA. He remained with UC Cooperative Extension until he retired in 2014.
Larry was a thoughtful, kind, and generous man who enjoyed fishing (particularly for walleye in Minnesota lakes), hiking, birding, gardening, and turning wooden bowls. He loved animals, especially his cats. He attended St. Mary's Catholic Church.
Larry's parents preceded him in death. He is survived by his wife Carol Frate of Visalia, CA; sister Gail (Dale) Erickson of Mankato, MN, sister-in-law Vicki Salzberg, nieces Sarah (Chris) Tracy and Emily Salzberg, grandnieces Anna and Simone, and grandnephews Owen and River of Olympia, WA.
A rosary followed by a Mass of Christian Burial will be at 1:30 pm on July 18, 2022, at Holy Family Catholic Church, 1908 N. Court St, Visalia, CA. Interment will be at a later date in Olympia, WA. Donations may be made to Pacific Wildlife Care, 1387 Main St., Morro Bay, CA 93442 or to a charity of choice.
From Ben: He taught me that you can not irrigate knowledgeably without a flow meter, and you might as well just gamble away your orchard unless you do a distribution uniformity test on the irrigation system. These are critical tools, creating good water management and healthy orchards.
Ventura and parts south of Gaviota have always had problems with growing European wine grapes. There are now varieties that are resistant to Pierce's Disease. Come learn about them. And register soon, it will be limited in numbers because of the intimacy of the tasting experience that will be included.
Trunk injection is a technique for applying plant protection materials that offers an
alternative to foliar sprays or soil drenches. Among the main advantages that trunk injection provides over conventional methods are a higher efficiency of product delivery, reduced risk for worker exposure, reduced risk to the environment, reduced harm to non-target organisms, and the possibility for use in populated areas where other methods are not an option. Trunk injection techniques have not been optimized for use in commercial crop production; however, there is a long history of using the method in a variety of cropand non-crop species.
According to the dictionary, the term “injection” is the act or process of forcing a
liquid medicine or drug into someone or something, usually by using a special needle. In botany, this term is used in a wider sense and includes any introduction of materials into a plant organ by cutting or through holes with or without force. In this sense, the earliest evidence for plant injection is from the 12th century, when Arabic horticulturists applied perfumes, spices, dyes, and other substances through wounds in plants to affect the smell,color, or other attributes of flowers and fruits . The first documented experimentation on trunk injections occurred in the 15th century by Leonardo da Vinci, who injected arsenic and other poisonous solutions through bore holes into apple trees to render the fruit poisonous. Other experimentation until the early 1900s included injection of different nutrient solutions such as ferrous sulphate and ferric chloride as remedies for nutritional deficiencies. This was followed by injection of other inorganic substances such as iron pyrophosphate, potassium cyanide, potassium phosphite and aluminum sulphate to control insects and plant
diseases. In addition to inorganic materials, organic substances including salicylic acid and plant- and microorganism-derived liquids were injected by various methods for the same purpose.
A recently published literature review on trunk injection of citrus provides an excellent literature review and summary of pros/cons. "Trunk Injection as a Tool to Deliver Plant Protection Materials—An Overview of Basic Principles and Practical
Considerations" by Leigh Archer, Jonathan H. Crane, Ute Albrecht * has been
published in Horticulturae and is available online:
HTML Version: https://www.mdpi.com/2311-7524/8/6/552/htm
PDF Version: https://www.mdpi.com/2311-7524/8/6/552/pdf
CA Citrus Pest and Disease Prevention Program
ACP/HLB Grower Liaison
Ventura, Santa Barbara and San Luis Obispo Counties
805 284-3310 (phone or text)
- New and improved CDFA Citrus Division website: https://www.cdfa.ca.gov/Citrus/
- General ACP/HLB
o Information on the state ACP/HLB program including maps, quarantine information, and a signup option for email alerts: citrusinsider.org/
o Biology of ACP and HLB, detection maps and recommendations for monitoring, eradication and management: ucanr.edu/sites/acp/
o UC IPM recommendations for ACP
o Web-based map to find out how close you are to HLB: ucanr.edu/hlbgrowerapp
o Video on Best Practices in the Field, available in English and Spanish
o Summaries of the latest research to combat HLB: ucanr.edu/sites/scienceforcitrushealth/
o Science-based analyses to guide policy decisions, logistics, and operations: www.datoc.us
o Sign up for program updates from the Citrus Pest and Disease Prevention Division at www.cdfa/signup-email-updates.
o Regulatory requirements for moving bulk citrus: Information for Citrus Growers
o Summary of regulatory requirements in the event of an HLB detection in commercial citrus: citrusinsider.org/Regulatory-Flyer