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White Grub White Grub 60 species 60 species Phyllophaga criteria most common Phyllophaga criteria most common Grubs chew on roots Grubs chew on roots 4 - 5 grubs per square foot 4 - 5 grubs per square foot Takes 3 - 4 weeks for eggs to Takes 3 - 4 weeks for eggs to hatch hatch Egg laying period of 30 days Egg laying period of 30 days

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Page 1: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

White GrubWhite GrubWhite GrubWhite Grub 60 species60 species

Phyllophaga criteria most commonPhyllophaga criteria most common

Grubs chew on rootsGrubs chew on roots

4 - 5 grubs per square foot4 - 5 grubs per square foot

Takes 3 - 4 weeks for eggs to hatchTakes 3 - 4 weeks for eggs to hatch

Egg laying period of 30 daysEgg laying period of 30 days

Page 2: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

White Grub (cont.)White Grub (cont.)White Grub (cont.)White Grub (cont.)

3rd instar does most 3rd instar does most

of the damageof the damage

Overwinters in 3rd Overwinters in 3rd

instar stageinstar stage

Control aimed at Control aimed at

newly hatched grubsnewly hatched grubs

Page 3: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

White grubs in bluegrassWhite grubs in bluegrass

Page 4: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying
Page 5: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying
Page 6: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Sod webworms in St. AugustineSod webworms in St. Augustine

Page 7: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Sod webworm tunnelsSod webworm tunnels

Page 8: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Sod webwormSod webworm

Page 9: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Sod WebwormsSod WebwormsSod WebwormsSod Webworms

Bermudagrass, Zoysiagrass & Bermudagrass, Zoysiagrass &

St. Augustinegrass St. Augustinegrass

Page 10: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

HelminthosporiumHelminthosporiumHelminthosporiumHelminthosporium

BermudagrassBermudagrass

70 - 80º F70 - 80º F

Page 11: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

HelminthosporiumHelminthosporium in in bermudagrassbermudagrass

Page 12: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

HelminthosporiumHelminthosporium in in bermudagrassbermudagrass

Page 13: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Dollar SpotDollar SpotDollar SpotDollar Spot BermudagrassBermudagrass

60 - 80º F60 - 80º F

Wet foliageWet foliage

Page 14: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Dollar spot in bermudaDollar spot in bermuda

Page 15: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

TargetingTargeting

ApplicationsApplications

TargetingTargeting

ApplicationsApplications

Page 16: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

AA SS OO NN DD JJ FF MM AA MM JJ JJ AA SS OO

MonthsMonths

1010

88

66

44

22

00

Winter Broadleaf Winter Broadleaf WeedsWeeds

Summer Broadleaf Summer Broadleaf WeedsWeeds

Poa AnnuaPoa AnnuaCrabgrassCrabgrass

Weed PopulationWeed Population

Weed Control ProgramsWeed Control Programs

Page 17: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Biological Biological ControlsControls

Biological Biological ControlsControls

Page 18: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Fall army wormFall army worm

Page 19: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Fall ArmywormsFall ArmywormsFall ArmywormsFall Armyworms Favored by cool, wet weatherFavored by cool, wet weather

Feed chiefly at nightFeed chiefly at night

Defoliate plantsDefoliate plants

Early damage, loss of chlorophyllEarly damage, loss of chlorophyll

Page 20: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

ResistantResistant

VarietiesVarieties

ResistantResistant

VarietiesVarieties

Page 21: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Screening St. Augustine for Screening St. Augustine for chinch bug resistancechinch bug resistance

Page 22: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying
Page 23: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying
Page 24: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying
Page 25: White Grub 360 species 3Phyllophaga criteria most common 3Grubs chew on roots 34 - 5 grubs per square foot 3Takes 3 - 4 weeks for eggs to hatch 3Egg laying

Purpose of IPMPurpose of IPMPurpose of IPMPurpose of IPM

Reduce the need for Reduce the need for

pesticidespesticides


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