Fungicide Efficacy and Product Update for Botrytis Gray Mold Gerald Holmes Director
Procedure • Strip bloom • Begin applications at first flowers • Apply on 7‐day interval • Make 5 applications (flower to fruit) • Evaluate in field • Evaluate postharvest
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2
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Architecture of calyx
Postharvest evaluation
3
Mid‐season evaluation
Early season evaluation
12/15/2017
4
12/15/2017
5
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6
12/15/2017
UC‐IPM online
New product • Strobilurin (FRAC 11) • Active ingredient: mandestrobin • Better efficacy on Botrytis than other strobis • Suppression of powdery mildew • 0‐day PHI • Max 2 applications/year
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12/15/2017
Label change • Thiram: now 1‐day PHI
Conventional FRAC
Efficacy
Product
FRAC
Efficacy
* Luna Sensation
Product
7+11
++++
Ph‐D/Oso
19
++
* Luna Tranquility
7+9
++++
Pristine
7+11
++++
Procure
3
+
Topsin‐M
1
+++
Quadris Top
3+11
++
Captan
M4
+++
Quilt Xcel
3+11
+++
Elevate
19
++++
Abound
11
++
Captevate
19+M4
+++
Cabrio
11
++
Rovral
2
+++
Evito
11
++
Switch
9+12
++++
Fontelis * Kenja * Merivon
7
++++
Scala
9
+++/+
7
++++
+++
++++
Thiram * Intuity
M3
7+11
11
++/+
++++ = highly effective ‐‐‐ = not effective
* Relatively new product
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12/15/2017
Conventional Product * Luna Sensation * Luna Tranquility Fontelis * Kenja * Merivon