Greenhouse PestsGreen Peach AphidSlide 3Slide 4Slide 5Melon or Cotton AphidSlide 7Slide 8Slide 9Citrus MealybugSlide 11Slide 12Slide 13Longtailed MealybugSlide 15Slide 16Root MealybugsSlide 18Brown Soft ScaleSlide 20Slide 21Slide 22Hemispherical ScaleSlide 24Slide 25Boisduval ScaleSlide 27Slide 28Fern ScaleSlide 30Slide 31Greenhouse WhiteflySlide 33Slide 34Slide 35Silverleaf WhiteflySlide 37Slide 38Slide 39Greenhouse ThripsSlide 41Slide 42Slide 43Slide 44Western Flower ThripsSlide 46Slide 47Slide 48Darkwinged Fungus GnatsSlide 50Slide 51Slide 52Shore FlySlide 54Twospotted Spider MiteSlide 56Slide 57Slide 58Broad MiteSlide 60Slide 61Slide 62Cyclamen MiteSlide 64Slide 65Slide 66GreenhouseGreenhousePestsPestsDr. Vera Krischik, Department ofEntomology, University of MinnesotaGreen Peach AphidGreen Peach AphidMyzus persicae Order HemipteraFamily AphididaeDescription: Light to dark green with a grove between the red eyes. Three dark lines run down the back. May be winged or wingless.Jack Kelly ClarkUniversity of CaliforniaGreen Peach AphidGreen Peach AphidHosts: Over 100 hosts, including spinach, potato and peach. Life History: Alternation between sexual and parthenogenic generations. Females give birth to live young in greenhouses.Adult female and nymphOhio State UniversityOhio State UniversityWinged adultGreen Peach AphidGreen Peach AphidDamage: Yellowing and curling of leaves, honeydew, sooty mold. May transmit viruses.Monitoring: Look for aphids and damage.Green peach aphids on chrysanthemumOhio State UniversityGreen Peach AphidGreen Peach AphidCultural Control: Fix cracks and holes in the greenhouse, remove heavily infested plants.Chemical Control: Oils, soaps, etc. Use biorationals, such as Pymetrozine (Endeavor), to conserve beneficials.Biological Control:Lady beetles, minutepirate bugs (Orius sp.),lacewing larvae, parasiticwasps, the midgeAphidoletes aphidimyza.Lady beetle: Hippodamia convergensRobert M. McPhersonUniversity of Georgiawww.insectimages.orgMelon or Cotton AphidMelon or Cotton AphidAphis gossypiiOrder HemipteraFamily AphididaeDescription: Adults are 1.0 to 1.5 mm long and yellow to dark green with a black head and thorax.Melon aphids and parasitized aphid mummyJack Kelly ClarkUniversity of CaliforniaMelon or Cotton AphidMelon or Cotton AphidHosts: Many, including cotton, cucurbits, strawberry, bean, spinach, tomato, and begonia.Life History: Alternation between sexual and parthenogenic generations. Females give birth to live young in greenhouses.Melon aphids on chrysanthemumOhio State UniversityMelon or Cotton AphidMelon or Cotton AphidDamage: Distorted growth, decreased yield, honeydew, sooty mold. May transmit viruses.Monitoring: Look for aphids and damage.Cultural Control: Fix cracks and holes in greenhouse, remove heavily infested plants. Clemson UniversityUSDA Cooperative Extension Slide Serieswww.insectimages.orgMelon or Cotton AphidMelon or Cotton AphidChemical Control: Oils, soaps, etc. Use biorationals to conserve beneficials.Biological Control: Lady beetles, minute pirate bugs (Orius sp.), lacewing larvae, parasitic wasps, Aphidoletes aphidimyza.Aphidoletes aphidimyza larvae (left) and parasitoid (right) attacking melon aphidsOhio State UniversityOhio State UniversityCitrus MealybugCitrus MealybugPlanococcus citriOrder HemipteraFamily PseudococcidaeHosts: Females grow to 3 mm long. White, waxy filaments protrude from the periphery. Males are small and winged. Crawlers are yellow.Lance S. Osborne University of FloridaAdult female, nymph, and crawlersCitrus MealybugCitrus MealybugHosts: Plants in 27 familes, including begonia, coleus, amaryllis, cyclamen, and dahlia.Life History: Females produce cottony ovisacs from which crawlers appear. Males are rarelyseen.Lance S. Osborne University of FloridaAdult maleCitrus MealybugCitrus MealybugDamage: Distorted growth, leaf drop, honeydew, sooty mold, cottony wax.Monitoring: Look for cottony wax, adult females, and crawlers.Cultural Control:Remove infestedplants.Mealybugs on coleus. Note the white wax, yellow crawlers and pale pink females.Clemson UniversityUSDA CooperativeExtension Slide Serieswww.insectimages.orgCitrus MealybugCitrus MealybugChemical Control: Oils, biorationals, and systemic insecticides such as imidacloprid. Biological Control: The lady beetle Cryptolaemus montrouzieri and parasiticwaspsLeptomastixdactylopii andAnagyruspseudococci. Cryptolaemus montrouzieri. The larva mimics a mealybug.Jack Kelly ClarkUniversity of CaliforniaLongtailed MealybugLongtailed MealybugPseudococcus longispinusOrder HemipteraFamily PseudococcidaeDescription: Adult females have 17 pairs offilaments and are6 to 7 mm longincluding filaments.Males have wings. Lance S. Osborne University of FloridaJack Kelly ClarkUniversity of CaliforniaAdult females (top and bottom)Longtailed MealybugLongtailed MealybugHosts: Many plants. Dracaena is a favorite.Life History: Femalesgive birth to live young on fluffy wax.Damage: Distortedgrowth, honeydew, sooty mold, fluffy wax.Monitoring: Look for cottony wax, adult females, and crawlers.Longtailed MealybugLongtailed MealybugCultural Control: Remove infested plants.Chemical Control: Oils, biorationals, and systemic insecticides such as imidacloprid. Chemical control is difficult.Biological Control: Cryptolaemus montrouzieri, lacewing larvae, andthe parasitic waspAnagyrus nigricornis. Adult malehttp://www.hortnet.co.nz/Root MealybugsRoot MealybugsRhizoecus spp.Order HemipteraFamily PseudococcidaeDescription: Whiteand 1.6 to 3.9 mm long(depending on species).Some have waxyfilaments that form a netting. Hosts: Many plants, including chrysanthemum, anemone, gladiolus, iris, African violet, Achillea, Arctostaphylos, Geum, and Polygala.Jack Kelly ClarkUniversity of CaliforniaNymphsJack Kelly ClarkUniversity of CaliforniaRoot MealybugsRoot MealybugsLife History: Eggs are laid in a loose ovisac. All stages can be found on roots and potting mix of African violets.Damage: Devitalization, foliage deterioration, death.Monitoring: Examine plant root balls. The presence of ants can indicate mealybugs.Cultural Control: Remove infested plants, control ants.Chemical Control: Systemic insecticides, such as imidacloprid, are the most effective.Brown Soft ScaleBrown Soft ScaleCoccus hesperidiumOrder HemipteraFamily CoccidaeDescription: Femalesare 2.5 to 4 mm long,yellowish to brown,often mottled. Crawlersand nymphs are yellow.Males are winged. Hosts: Hundreds of plants, especially perennials and