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Controlling Insect Pests
on Tropical Plants
Most Common Insects
 Aphids
 Spider Mites
 Mealybug
 Whitefly
 Thrips
Damaged Caused by Insects
Aphids on
Hibiscus
• Can produce 12 offspring per day
without mating
• May transmit viruses
• Seldom kill a plant but can turn
leaves yellow and stunt shoots
• Buds can abort with enough
infestation
• Create honeydew which can
become sooty mold
Spider Mites
on Cordyline
• Larvae hatch and complete
development in 1-2 weeks
• Reproduction faster in warm
temperatures
• Use piercing-sucking mouthparts
to feed on sap
• Give leaves a stippled
appearance
• Infestations more likely when hot
and dry
Mealybug on
Hibiscus
• Lay 100-200 or more eggs over a 10-
20 day period
• Suck sap from plant phloem
• There are over 170 species of
mealybug
• Secrete honeydew resulting in sooty
mold
• Can attack stems, leaves, flowers
and roots
• Covered in a powdery wax
Thrips on
Schefflera
• Life cycle can be as short as 2
weeks in warm conditions
• Feeding results in scar formation
as well as distorted growth
• Feed by puncturing the
epidermal layer of host tissue
and sucking out the cell contents
• Have up to 8 generations per
year
• May transmit viruses
Whitefly on
Hibiscus
• They are sap sucking insects that
can cause yellowing or death of
leaves
• Typically found on the underside
of leaves
• Also secrete honeydew
• Despite their name, they are not
truly flies but are in the order
hemiptera
Control of Insect Populations
Aphids
• Bio Controls
• Botanigard – 16 oz/100
• Aphidius colemani
• Chrysopa carnea
• Chemical Controls
• M-Pede (UNM)– 1 gallon/100
• Flagship (4a) – 8 oz/100
• Endeavor (9b) – 5 oz/100
• Mainspring (28) – 8 oz/100
• Aria – (9c)2 oz/100
Spider Mites
• Bio Controls
• Phytoseiulus persimilus
• Amblyseius andersoni
• Amblyseius californicus
• Chemical Controls
• Pylon (13)– 5.2 oz/100
• Sultan (25a) - 13.7 oz/100
• Avid (6)– 8 oz/100
• Floramite (25)– 8 oz/100
• Sanmite (21a)– 9.6 oz/acre
Mealybug
• Bio Controls
• Chrysopa carnea
• Cryptolaemus montrouzieri
• Chemical Controls
• Mesurol (1a)– 8 oz/100
• Orthene (1b)– 10 oz/100
• Tristar (4a)– 2.7 oz/100
• Rycar (9b)– 6.4 oz/100
• Horticultural Oil - 2%
Whitefly
• Bio Controls
• Encarsia Formosa
• Eretmocerus eremicus
• Amblyseius swirskiii
• Chemical Controls
• Avid (6)– 8 oz/100
• TriStar (4a)– 2.7 oz/100
drench
• Mainspring (28)– 8 oz/100
• Kontos (23)– 3.4 oz/100
drench
• Altus (4d)– 3.7 oz/100 drench
Thrips
• Bio Controls
• Orius laevigatus
• Amblyseius cucumeris
• Amblyseius swirskii
• Chemical Controls
• Kontos (23)– 3.4 oz/100 drench
• Mainspring (28)– 10 oz/100
drench
• Mesurol (1a)– 16 oz/100
• Overture (UN)– 8 oz/100

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Tech On Demand: Controlling Insect Pests on Tropical Plants

  • 1. Controlling Insect Pests on Tropical Plants
  • 2. Most Common Insects  Aphids  Spider Mites  Mealybug  Whitefly  Thrips
  • 4. Aphids on Hibiscus • Can produce 12 offspring per day without mating • May transmit viruses • Seldom kill a plant but can turn leaves yellow and stunt shoots • Buds can abort with enough infestation • Create honeydew which can become sooty mold
  • 5. Spider Mites on Cordyline • Larvae hatch and complete development in 1-2 weeks • Reproduction faster in warm temperatures • Use piercing-sucking mouthparts to feed on sap • Give leaves a stippled appearance • Infestations more likely when hot and dry
  • 6. Mealybug on Hibiscus • Lay 100-200 or more eggs over a 10- 20 day period • Suck sap from plant phloem • There are over 170 species of mealybug • Secrete honeydew resulting in sooty mold • Can attack stems, leaves, flowers and roots • Covered in a powdery wax
  • 7. Thrips on Schefflera • Life cycle can be as short as 2 weeks in warm conditions • Feeding results in scar formation as well as distorted growth • Feed by puncturing the epidermal layer of host tissue and sucking out the cell contents • Have up to 8 generations per year • May transmit viruses
  • 8. Whitefly on Hibiscus • They are sap sucking insects that can cause yellowing or death of leaves • Typically found on the underside of leaves • Also secrete honeydew • Despite their name, they are not truly flies but are in the order hemiptera
  • 9. Control of Insect Populations
  • 10. Aphids • Bio Controls • Botanigard – 16 oz/100 • Aphidius colemani • Chrysopa carnea • Chemical Controls • M-Pede (UNM)– 1 gallon/100 • Flagship (4a) – 8 oz/100 • Endeavor (9b) – 5 oz/100 • Mainspring (28) – 8 oz/100 • Aria – (9c)2 oz/100
  • 11. Spider Mites • Bio Controls • Phytoseiulus persimilus • Amblyseius andersoni • Amblyseius californicus • Chemical Controls • Pylon (13)– 5.2 oz/100 • Sultan (25a) - 13.7 oz/100 • Avid (6)– 8 oz/100 • Floramite (25)– 8 oz/100 • Sanmite (21a)– 9.6 oz/acre
  • 12. Mealybug • Bio Controls • Chrysopa carnea • Cryptolaemus montrouzieri • Chemical Controls • Mesurol (1a)– 8 oz/100 • Orthene (1b)– 10 oz/100 • Tristar (4a)– 2.7 oz/100 • Rycar (9b)– 6.4 oz/100 • Horticultural Oil - 2%
  • 13. Whitefly • Bio Controls • Encarsia Formosa • Eretmocerus eremicus • Amblyseius swirskiii • Chemical Controls • Avid (6)– 8 oz/100 • TriStar (4a)– 2.7 oz/100 drench • Mainspring (28)– 8 oz/100 • Kontos (23)– 3.4 oz/100 drench • Altus (4d)– 3.7 oz/100 drench
  • 14. Thrips • Bio Controls • Orius laevigatus • Amblyseius cucumeris • Amblyseius swirskii • Chemical Controls • Kontos (23)– 3.4 oz/100 drench • Mainspring (28)– 10 oz/100 drench • Mesurol (1a)– 16 oz/100 • Overture (UN)– 8 oz/100