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      February 09, 2010 Pest Solutions        
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Mealybug & Scale Insects  

Mealybugs Mealybugs (Order Homoptera, Family Pseudococcidae)
are sucking insects that feed on plant fluids. Feeding weakens and may kill plants. Honeydew produced by mealybugs can cover leaves and flowers, and is a substrate for black sooty fungus.

Mealybug developmental stages are egg, nymph (females, four instars; males, five instars), and adult. Egg to adult development takes about 60 days, but varies widely with individual species. It may take up to one year in cool temperatures. Adult males are totally different looking than females, resembling small midge-like insects.

Soft and armored scale insects are sucking pests that feed on plant fluids. Feeding weakens and may kill plants. Honeydew produced by soft scales can cover leaves and flowers, and is a substrate for black sooty fungus. Armored scales do not produce honeydew.

Scale InsectsSoft and armored scale developmental stages are egg (or live nymph), nymph (females, three instars; males, five instars), and adult. Adult males are totally different looking than females, resembling small midge-like insects. Females of some species reproduce without mating (parthenogenesis). Soft scale (Order Homoptera, Family Coccidae) development from egg to adult is about 60 days, and armored scale (Order Homoptera, Family Diaspididae) development is about 180 days, but varies widely with individual species.

 

Marathon® 60 WP G&N in WSP - Systemic Insecticide
For Systemic Insect Control in Ornamental Crops
Rate: 1 x 20 gram packet in appropriate amount of water
Signal Word: Caution REI: 0 - 12 hours (read label)

Marathon® 1% Granular - Systemic Insecticide
For Systemic Insect Control in Ornamental Crops — Mealybug only
Rate: Refer to label
Signal Word: Caution REI: 0 - 12 hours (read label)

Marathon is applied topically or as a drench to control mealybug and scale insects. For best control, apply prior to infestation, if possible. Control may take longer in some woody plant material but should exceed 8 weeks. Always read the label.

Marathon® II – Translaminar Systemic Insecticide
For Foliar Applications for Insect Control in Greenhouse, Nursery and Interiorscapes
Rate: 50 mL (1.7 oz.) per 100 gallons
Signal Word: Caution REI: 12 hours

Marathon II is for foliar applications only. Marathon II full cover spray should commence before intense insect pressure is present. Marathon II is compatible with commonly used pesticides and foliar fertilizers. The use of a spreader/sticker is recommended. Marathon II can achieve 14 to 21 days control. Always read the label and technical bulletins prior to product use.

Azatin® XL - Insect Growth Regulator
For Indoor and Outdoor Use on Ornamentals and Horticultural Crops
Rate: 12 — 16 oz. per 100 gallons (Curative)
Signal Word: Caution REI: 4 hours

Spray applications of Azatin XL insect growth regulator will control the nymphs and crawler stages. Tank mix with Decathlon 20 WP synthetic pyrethroid to control crawler stages of mealybug and scale. Repeat applications at 5 to 7 day intervals. Always read the label.
Azatin is a registered trademark of Certis USA.

Triact® 70 – Clarified Hydrophobic Extract of Neem Oil
Broad Spectrum Fungicide/Miticide/Insecticide
Rate: 0.5% - 1% per 100 gallons
Signal Word: Caution REI: 4 hours

Triact 70 is an effective component in controlling mealybug and scale insects as a rotational product. Applications should be made on a 7 to 10 day spray interval depending on severity of infestation. Apply to runoff at 25 to 40 psi with a hand sprayer or 100 to 200 psi with power equipment. Triact 70 should be mixed in water with a temperature of greater than 45° F. Before mixing, shake well. Triact 70 is tank mix compatible with commonly used pesticides and foliar fertilizers. Always read the label and technical bulletins prior to product use. Triact is a registered trademark of Certis USA.

Decathlon™ 20 WP - Synthetic Pyrethroid
For Broad-Spectrum Control of Crawling and Flying Insect Pests on Ornamentals and Nursery Stock
Rate: 1.9 oz. per 100 gallons
Signal Word: Caution REI: 12 hours

Spray applications of Decathlon 20 WP synthetic pyrethroid will control the nymphs and crawler stages of mealybug and scale. Tank mix with Azatin XL insect growth regulator to control crawler stages of mealybug and scale is suggested. Repeat applications at 5 to 7 day intervals. Always read the label.

 

   
Aphids
Caterpillars (worm)
Foliar Diseases
Foliar Nematodes
Fungus Gnat
Lace Bug
Leafminer
Mealybug & Scale Insects
Mites
Soil Born/Damping Off Diseases
Soil Wetting and Moisture Management
Thrips