Poinsettia Solutions PGR Solutions Insect Solutions Disease Solutions Quick Ref. Guide

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Aphids are sucking insects that feed on plant fluids. The presence of aphids or white cast–off skins on leaves or flowers may reduce plants value. Heavy infestations will reduce plant growth. Honeydew produced by aphids makes leaves and fruits sticky and is a substrate for black sooty fungus. Many aphid species transmit viruses affecting vegetable and ornamental plants.

Aphid developmental stages are egg, nymph and adult. In tropical areas adults are all females that produce live young. Outdoors in temperate areas aphids overwinter as eggs, which hatch in the spring as females. Adult aphids may or may not have wings. The best temperatures for development vary with the species. For example the chrysanthemum aphid develops best at 68°F(20°C), the green peach aphid at 73°F(23°C), and the melon aphid at temperatures above 75°F(24°C). Plant nutrition affects aphid development and size. Moisture stress often increases aphid numbers. Temperatures above 86°F(30°C) and relative humidity above 85% reduce green peach aphid longevity and reproduction.

Discus™ – Nursery Insecticide
Apply 25 fluid ounces per 100 gallons as a foliar spray; OR apply 3.4 to 5.6 fluid ounces per 1000 ft2 as a spray to the soil surface, followed by irrigation or rainfall to move the active ingredient to the root zone. Use at least 2 gallons of spray volume per 1000 ft2; OR apply .75–1.5 fluid ounces per inch of trunk diameter (at breast height) or per foot of shrub height. Use a minimum of 10 gallons of water per 1000 ft2 as a drench; OR mix 13 fluid ounces (385 ml) in the appropriate amount of water for drenching containers of different sizes (see label).

Marathon® II – Systemic and Translaminar Insecticide
Apply 1.7 fluid ounces (50 ml) per 100 gallons as a foliar spray; OR mix 1.7 fluid ounces in the appropriate amount of water for drenching containers of different sizes (see label); OR apply 0.1–0.2 fluid ounces per inch of trunk diameter (at breast height) or per foot of shrub height. Use a minimum of 10 gallons of water per 1000 ft2 as a drench. Shake well before use.

Marathon® 60WP in WSP – Systemic Insecticide
Mix one 20 gram packet in the appropriate amount of water for drenching containers of different sizes (see label) OR apply one 20 gram packet per 8 to 16 inches of cumulative trunk diameter (at breast height) or per 8 to 16 feet of cumulative shrub height. Use a minimum of 10 gallons of water per 1000 ft2 as a drench.

Marathon® 1% G – Systemic Insecticide
Marathon® 1% Granular systemic insecticide is applied topically to the growing media or incorporated prior to planting.
See label for application rates for different container sizes; OR Apply 15 ounces per 1000 ft2.

Azatin® XL – Insect Growth Regulator
Apply 10 to 16 fluid ounces per 100 gallons to target aphid nymphs. Tank mix with Decathlon 20WP to target adults and improve control of nymphs. The pH of the spray solution should be maintained between 3 and 7. For best results use a spray adjuvant. Repeat applications at 5 to 7 day intervals.

Decathlon™ 20 WP – Synthetic Pyrethroid
Apply 1.9 ounces (54 grams) per 100 gallons to target aphid adults and nymphs. Tank mix with Azatin XL insect growth regulator to improve control of nymphs. Repeat at 5 to 7 day intervals.

Triact® 70 – Clarified Hydrophobic Extract of Neem Oil
Mix 1–2 gallons per 100 gallons and apply as a foliar spray. Repeat applications at 7–14 day intervals as required.