March 2024 - 9

PLANT & SOIL HEALTH
" I work very closely with him in different aspects for
THE PATHOGEN MAY BLOCK
THE VASCULAR SYSTEM OF THE
PLANT, INTERFERE WITH THE
WATER AND NUTRIENT MOVEMENT,
CAUSING WILTING SYMPTOMS
IN PLANTS. MULTIPLE CYCLES OF
INFECTION COULD HAPPEN IN A
SINGLE GROWING SEASON.
- Rishi Burlakoti
to the susceptible Chemainus and the moderatelyresistant
Cascade Bounty, which were monitored for
RRW symptoms.
Over the course of the project, the researchers
identified five methods breeders can evaluate raspberry
varieties. Burlakoti worked with breeder Michael Dossett
of BC Berry Cultivar Development Inc. on the project,
and the research and development center's team and
Dossett published their findings in a paper, " Development
of effective method for pathogenicity and screening of
Phytophthora spp. on red raspberry seedlings. "
resistance breeding. That means trying to help to screen
the materials and then he incorporates resistance
breeding materials in his breeding program. "
They also studied virulence diversity in P. rubi,
collecting samples from throughout British Columbia
fields, finding that more than 75% of isolates produced
severe wilting and root rot symptoms.
Multipronged approach to fight
RRW in raspberries
Burlakoti said planting disease-resistant varieties
is always a good option, but the " dynamics between
the pathogen and plant interaction " means that initial
resistance in the field will at some point be surpassed by
a pathogen.
Fungicide applications in early spring and fall are key, he
said, with foliar fungicides (fosetyl-Al, FRAC group 33) and
soil application of metalaxyl-m, commercially known as
Ridomil Gold (FRAC group 4), oxathiapiprolin (FRAC group
49) and cyazofamid (FRAC group 21) registered in Canada.
Cultural practices, including proper drainage, avoiding
planting in heavy soils, using raised beds with plastic or
other mulches should also be integrated into programs
to fight the disease.
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FRUITGROWERSNEWS.COM | 9

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March 2024

Table of Contents for the Digital Edition of March 2024

Editor's Letter
Plant & Soil Health: Scientists study raspberry root rot and wilt
Pest Management: Pest update
Berries: Tech aids Salinas Valley grower
Southeast Regional Fruit & Vegetable Conference: Lawton Pearson named Mr. Peach
Organic Grower Winter 2024
Business: The surprising challenge
Farm Market & Agritourism: Keeping CSA members engaged and loyal
Ag Labor Review: 60 years of advocating for agricultural employers
Classifieds
Advertiser Index
March 2024 - 1
March 2024 - 2
March 2024 - 3
March 2024 - Editor's Letter
March 2024 - 5
March 2024 - Plant & Soil Health: Scientists study raspberry root rot and wilt
March 2024 - 7
March 2024 - 8
March 2024 - 9
March 2024 - Pest Management: Pest update
March 2024 - 11
March 2024 - Berries: Tech aids Salinas Valley grower
March 2024 - 13
March 2024 - 14
March 2024 - 15
March 2024 - 16
March 2024 - 17
March 2024 - Southeast Regional Fruit & Vegetable Conference: Lawton Pearson named Mr. Peach
March 2024 - 19
March 2024 - 20
March 2024 - Organic Grower Winter 2024
March 2024 - 22
March 2024 - 23
March 2024 - 24
March 2024 - Business: The surprising challenge
March 2024 - 26
March 2024 - 27
March 2024 - Farm Market & Agritourism: Keeping CSA members engaged and loyal
March 2024 - 29
March 2024 - Ag Labor Review: 60 years of advocating for agricultural employers
March 2024 - 31
March 2024 - Classifieds
March 2024 - 33
March 2024 - Advertiser Index
March 2024 - 35
March 2024 - 36
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