P persimilis amp N californicus Anna D Howell UCCEVentura County Oleg Daugovish UCCEVentura County Predatory Mites Acari Phytoseiidae Effective regulators of several crop pests ID: 759856
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Slide1
Miticide Compatibility with P. persimilis & N. californicus
Anna D. Howell (UCCE-Ventura County)Oleg Daugovish (UCCE-Ventura County)
Slide2Predatory Mites(Acari : Phytoseiidae)Effective regulators of several crop pestsSpider mites Cyclamen / broad mites Eriophyid mitesThripsCan be incorporated in IPM programs for strawberry
Slide3Predatory Mites Some can be found occurring naturally>9 spp. found on strawberry alone (Oatman 1971)Neoseiulus californicus
Slide4Commercially reared & releasedPhytoseiulus persimilis, N. californicus, N. fallacis, Amblyseius andersoni, A. cucumeris, Galendromus occidentalis, etc.Release rates depend on species, pest pressure, crop
Slide5Incorporation requires knowledge & understanding of interactions with crop management practicesThey are living breathing organismsSafeguarding can conserve populationsEnvironment can affect control efficacyTemperature, humidity, prey & other food sources, crop type, pesticides
Slide6Incorporation requires knowledge & understanding of interactions with crop management practicesThey are living breathing organismsSafeguarding can conserve populationsEnvironment can affect control efficacyTemperature, humidity, prey & other food sources, crop type, pesticides
Slide7How do miticides affect predators?
Slide8Leaf (1” disc) dip at the label rate & allowed to dry
Treated leaf placed inside a petri dish with wet filter paperFilter paper moistened daily
Methods
Slide97 adult
P. persimilis are placed onto the leaf (♀ & ♂’s) >35 TSSM motiles & eggs placed on the leaf for foodTSSM replenished every day
Methods
Slide10Temp: 82.4
ᵒF ± 1 ᵒF% RH : 60-65%16:8 hr (L:D)RCBD on benchtop, 5 reps
Lab Conditions
Slide11Corrected Percent Mortality (
P.
persimilis)
Slide12Fecundity (# eggs produced)
Slide13Fertility (# young produced)
Slide14Total live predators
Slide15Harsh on
P. persimilis: Fujimite & Envidor“Soft” on P. persimilis: Nealta“Softer” on P. persimilis: Acramite & Kanemite
Guidelines
Slide16Bean leaf dip at the label rate & allowed to dry
Treated leaf placed inside a petri dish with wet filter paperFilter paper moistened daily
Methods
Slide177 adult
N. californicus are placed onto the leaf (♀ & ♂’s) >35 Pacific spider mite motiles & eggs placed on the leaf for foodSpider mites replenished every day, old/dead taken off
Methods
Slide18Temp: 80
ᵒF ± 1 ᵒF% RH : 60-65%16:8 hr (L:D)RCBD in Envir. Chamber4 Reps
Lab Conditions
Slide19Corrected Percent Mortality (N. californicus)
Slide20Fecundity (# eggs produced)
Slide21Fertility (# young produced)
Slide22Total live predators
Slide23Harsh on
N. californicus: Zeal & Oberon“Soft” on N. californicus : Acramite & Nealta
Guidelines
Slide24Acknowledgements
Darin Allred (Arysta LifeSciences)Brett Chandler (Associates Insectary)Sally Gray & Dan Cahn (Bioline Agroscience)Kate Walker (BASF)Michael Roberts