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Dr. Vera Krischik, Department of Entomology University of Minnesota www.entomology.umn.edu/cues. Mites: Identification and management. Mites. Egg, larva, protonymph, deutonymph, adult Four pairs of legs; three pairs on larva 1 body segment Chelicerae, fangs like spiders Suck cells

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Dr vera krischik department of entomology university of minnesota www entomology umn edu cues l.jpg

Dr. Vera Krischik,

Department of Entomology

University of Minnesota

www.entomology.umn.edu/cues

Mites: Identification and management


Mites l.jpg
Mites

  • Egg, larva, protonymph, deutonymph, adult

  • Four pairs of legs; three pairs on larva

  • 1 body segment

  • Chelicerae, fangs like spiders

  • Suck cells

  • Cause chlorosis; yellowing of foliage

  • Transmit disease

  • Diagnostics: chlorosis, webbing, rusetting, galls


Mites3 l.jpg
Mites

  • Female: round abdomen

  • Male: pointed abdomen

  • Larva: 3 pairs of legs



Warm cool season mites l.jpg
Warm/cool season mites

Warm season

  • twospotted spider mite

  • European red mite

  • bulb mite

  • gall, rust mite

  • cyclamen mite

    Cool season

  • spruce spider mite

  • clover mite


Mites in the greenhouse l.jpg
Mites in the greenhouse

Family Tetranychidae:

  • twospotted spider mite

  • Lewis mite

    Family Tarsonemidae:

  • cyclamen mite

  • broad mite

    Family Acaridae:

  • bulb mite

    Family Eriophyidae:

  • gall, rust mite


Mites in the landscape l.jpg
Mites in the landscape

  • Family Eriophyidae: gall or vagrant mites

  • Family Tetranychidae: spider mites

  • Family Tarsonemidae: cyclamen/broad

  • Family Phytoseiidae: predatory mites

  • Family Acaridae: bulb mite

  • Family Oribatidae: soil mites


Mites in the landscape8 l.jpg
Mites in the landscape

Family Eriophyidae: gall or vagrant mites

  • ash flower gall mite

  • elm eriophyid mite

  • hemlock rust mite

  • maple spindlegall mite

  • maple velvet erineum gall mite


Mites in the landscape9 l.jpg
Mites in the landscape

Family Tetranychidae:

  • spruce spider mite

  • twospotted spider mite

  • European red mite

  • honeylocust spider mite

  • clover mite


Predatory mites l.jpg
Predatory mites

Family Phytoseiidae:

  • Phytoseiuluspersimilis

  • Neoseiulus californium

  • Hypoaspis miles

  • Amblyseius cucumbers(= Neoseiulus cucumbers)


Miticides greenhouse l.jpg

Pesticide (Trade Name)

abamectin (Avid)

bifenthrin (Talstar)

chlorfenapyr (Pylon)

endosulfan (Thiodan)

lambda-cyhalothrin (Scimitar GC)

pyridaben (Sanmite)

Miticides: Greenhouse


Slide12 l.jpg

Pesticide (Trade Name)

abamectin (Avid)

bifenthrin (Talstar)

hexythiaxoz (Hexygon)

lambda-cyhalothrin (Scimitar GC)

pyridaben (Sanmite)

Miticides: Landscape


Family anthocoridae hemiptera l.jpg

Family: Anthocoridae (Hemiptera)

Predators: Minute Pirate BugsOrius insidiosus


Predators minute pirate bugs orius insidiosus l.jpg

Adult Minute Pirate Bugs live for 3 - 4 weeks and lay their eggs in plant tissue. The nymphs emerge in 4 - 5 days and become adults in 7 - 10 days.

Predators: Minute Pirate BugsOrius insidiosus


Family phytoseiidae predatory mites l.jpg

Family Phytoseiidae eggs in plant tissue. The nymphs emerge in 4 - 5 days and become adults in 7 - 10 days.

Predatory mites

Predatory mites:Phytoseiulus persimilis


Predatory mites phytoseiulus persimilis l.jpg

These predatory mites consume 5-10 pest adults or up to 20 pest eggs/day. When released during a low infestation, spider mites can be controlled within 2-3 weeks. P. persimilis need a relative humidity greater than 60% in order to survive, especially in the egg stage. Once the adults' food supply dwindles, P. persimilis die.

Predatory mites:Phytoseiulus persimilis

spider mites


Family phytoseiidae predatory mites17 l.jpg

Family Phytoseiidae pest eggs/day. When released during a low infestation, spider mites can be controlled within 2-3 weeks.

Predatory mites

Predatory mites: Neoseiulus californium


Predatory mites neoseiulus californium l.jpg

These predatory mites consume their prey at a leisurely pace of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Predatory mites: Neoseiulus californium

spider mites


Family phytoseiidae predatory mites19 l.jpg

Family Phytoseiidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Predatory mites

Predatory mites: Amblyseius cucumbers


Predatory mites amblyseius cucumbers l.jpg

Release of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F. cucumbers when thrips populations are low (monitor thrips populations with sticky blue traps), and allow several weeks for the predators to be effective.

Ideal conditions are 66-80 degrees F and a relative humidity of 65-72 %. These predators are most effective from March to November. Use in conjunction with thrips pupae predator Hypoaspis for improved control.

Predatory mites: Amblyseius cucumbers

Thrips, cyclamen mite


Family phytoseiidae predatory mites21 l.jpg

Family Phytoseiidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Predatory mites

Predatory mites: Hypoaspis miles


Predatory mites hypoaspis miles l.jpg

The female of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F. Hypoaspis mites lay their eggs in the soil, which hatch in 1-2 days, and the nymphs and adults feed on the soil-dwelling pests.

Each Hypoaspis mite will consume 5-20 prey or eggs per day. They survive by feeding on algae and/ or plant debris when insects aren't available. Their entire life cycle is 7-11 days.

Predatory mites: Hypoaspis miles

Bulb mite


Family eriophyidae erineum gall or vagrant mites male flowers persistent through winter l.jpg

Family Eriophyidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Erineum gall or vagrant mites

Male flowers

Persistent through winter

Ash flower gall mite


Ash flower gall mite l.jpg
Ash flower gall mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:ash

  • Life history:female stimulates galls

  • No. gen: several

  • Overwintering:females under bark

  • Monitoring: galls on male flowers

  • Risk:low

  • BC: low

  • Biorational pesticides: abamectin, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, carbaryl, deltamethrin, dicofol, fenbutatin oxide, lambda-cyhalothrin


Family tetranychidae spider mites turf long front legs webbing in fall l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Turf

Long front legs; webbing in fall

Clover mite


Clover mite l.jpg
Clover mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:grass

  • Life history:no males

  • No. gen: two or more

  • Overwintering:any stage; bark, walls

  • Monitoring: brown grass

  • Risk:low

  • BC: low

  • Biorational pesticides: abamectin, bifenazate, clofentazine, hexythiazox, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, chlorpyrifos (nursery), deltamethrin, dicofol, fenpropathrin, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Family tarsonemidae cyclamen mite l.jpg

Family Tarsonemidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Cyclamen mite

Cyclamen mite


Family tarsonemidae broad mite l.jpg

Family Tarsonemidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Broad mite

Broad mite


Family tarsonemidae cyclamen broad mite l.jpg
Family Tarsonemidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F. Cyclamen/broad mite

cyclamen mite

90Rh 60F

broad mite

90RH 80F


Family tarsonemidae cyclamen broad mite30 l.jpg

Cyclamen mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

African violets, ivy, snapdragon, chrysanthemum, cyclamen, delphinium, larkspur, geranium, fuchsia, begonia, petunia, daisy, and azalea.

Family TarsonemidaeCyclamen/broad mite

Broad mite

African violet, ageratum, azalea, begonia, cyclamen, dahlia,

gerbera, gloxinia, ivy, jasmine, impatiens, lantana, marigold,

peperomia, snapdragon, verbena, and zinnia.


Cyclamen mite l.jpg
Cyclamen mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:GH to landscape, delphiniums

  • Life history:mites hide in buds/ shoots

  • No. gen:several

  • Overwintering:continuous generations

  • Monitoring: distortion

  • Risk: high

  • Biorational pesticides: abamectin, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, dicofol, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Broad mite l.jpg
Broad mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:GH, house plants

  • Life history:mites hide in buds/ shoots

  • No. gen:several

  • Overwintering:continuous, males carry females to new leaves

  • Monitoring: distortion

  • Risk: high

  • Biorational pesticides: abamectin, neem oil, horticultural oil, insecticidal soap

  • Conventional pesticides: endosulfan, dicofol, pyridaben


Family eriophyidae erineum gall or vagrant mites gall persistent l.jpg

Family Eriophyidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Erineum gall or vagrant mites

Gall persistent

Elm eriophyid mite


Elm eriophyid mite l.jpg
Elm eriophyid mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:elm

  • Life history:female leaf hairs to expand

  • No. gen:several

  • Overwintering:females under bark

  • Monitoring: erineum galls/ felt-like patches on leaves

  • Risk: low

  • BC: low

  • Biorational pesticides: abamectin, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, carbaryl fenbutatin oxide, lambda-cyhalothrin


Family eriophyidae erineum gall or vagrant mites gall persistent35 l.jpg

Family Eriophyidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Erineum gall or vagrant mites

Gall persistent

Eriophyid mite


Family eriophyidae erineum gall or vagrant mites gall persistent36 l.jpg

Family Eriophyidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Erineum gall or vagrant mites

Gall persistent

Eriophyid mite


Eriophyid mite l.jpg
Eriophyid mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:many deciduous trees

  • Life history:female leaf hairs to expand

  • No. gen:several

  • Overwintering:females under bark

  • Monitoring: erineum galls/ felt-like patches on leaves

  • Risk: low

  • BC: low

  • Biorational pesticides: abamectin, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, carbaryl, dicofol, fenbutatin oxide, lambda-cyhalothrin


Family tetranychidae spider mites l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Honeylocust spider mite


Family tetranychidae spider mites39 l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Honeylocust spider mite


Honeylocust spider mite l.jpg
Honeylocust spider mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:honeylocust

  • Life history:distorts leaflet

  • No. gen:several

  • Overwintering:females under bark

  • Monitoring: wilting/ drying compound leaves

  • Risk: low

  • BC: low

  • Biorational pesticides: abamectin, bifenazate, clofentazine, hexythiazox, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, chlorpyrifos (nursery), deltamethrin, dicofol, fenpropathrin, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Family tetranychidae spider mites41 l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

European red mite


European red mite l.jpg
European red mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:flowering fruits

  • Life history:generation 2 weeks

  • No. gen:several

  • Overwintering:eggs on bark

  • Monitoring: stippling damage

  • Risk: low

  • BC: high

  • Biorational pesticides: abamectin, bifenazate, clofentazine, hexythiazox, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, chlorpyrifos (nursery), deltamethrin, dicofol, fenpropathrin, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Family eriophyidae erineum gall or vagrant mites l.jpg

Family Eriophyidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Erineum gall or vagrant mites

Maple velvet erineum gall mite


Maple velvet erineum gall mite l.jpg
Maple velvet erineum gall mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:many deciduous trees

  • Life history:female leaf hairs to expand

  • No. gen:several

  • Overwintering:females under bark

  • Monitoring: erineum galls/ felt-like patches on leaves

  • Risk: low

  • BC: low

  • Biorational pesticides: none

  • Conventional pesticides: carbaryl


Family tetranychidae spider mites45 l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Spruce Spider mite


Family tetranychidae spider mites46 l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Spruce Spider mite


Spruce spider mite l.jpg
Spruce spider mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:arborvitae, spruce, juniper, yew

  • Life history:damage in May

  • No. gen:several

  • Overwintering:reddish eggs on bark

  • Monitoring: stippling damage

  • Risk: medium

  • BC: high

  • Biorational pesticides: abamectin, bifenazate, clofentazine, hexythiazox, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, chlorpyrifos (nursery), deltamethrin, dicofol, fenpropathrin, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Family tetranychidae spider mite l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mite

Twospotted spider mite


Family tetranychidae spider mites49 l.jpg

Family Tetranychidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Spider mites

Twospotted spider mite


Twospotted spider mite l.jpg
Twospotted spider mite of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

  • Host:many trees, perennials, annuals

  • Life history:damage in June

  • No. gen:several

  • Overwintering:adults in leaf litter, grass

  • Monitoring: stippling damage, webbing

  • Risk: medium

  • BC: high

  • Biorational pesticides: abamectin, bifenazate, clofentazine, hexythiazox, horticultural oil, insecticidal soap

  • Conventional pesticides: bifenthrin, chlorpyrifos (nursery), deltamethrin, dicofol, fenpropathrin, fenbutatin oxide, lambda-cyhalothrin, pyridaben


Family oribatidae oribatid mites l.jpg

Family Oribatidae of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F.

Oribatid mites

Oribatid mite

Oribatid mite


Oribatid mite l.jpg
Oribatid of one adult or a few eggs per day; can survive longer under starvation conditions; and need a minimum of 60% humidity and temperatures 60-85 degrees F. mite

  • Host:soil

  • Life history:decomposition

  • No. gen:several

  • Overwintering:adults in soil

  • Monitoring: none

  • Risk: none

  • Pesticides: control not necessary


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