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Fungus gnat adults are small midge-like flies that cause no direct plant damage. However, the larvae can feed on roots or root hairs, stunting or killing young plants. Fungus gnats have been associated with several plant pathogens. Larval feeding damage may provide an entry point for plant pathogens.

Fungus gnat developmental stages are egg, larva (four instars), pupa, adult. Development from egg to adult takes about 12 days (80°F, 27°C) to 27 days (55°F, 13°C). High growing medium moisture and organic matter (composted manure, bark, leaf litter) are most favorable for fungus gnats. Adults are usually seen near the growing medium surface, but may be seen resting on plants. Larvae are in the growing medium or in plant stems below the medium surface.

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

Rate: Refer to label
Signal Word: Caution REI: 0 - 12 hours (read label)

Marathon is applied topically to the media and will provide excellent control of fungus gnats. Only apply to plant material with active healthy root system for additional systemic activity. Avoid leaching for about 10 days and keep media moist. Always read the label.

Marathon® II – Translaminar Systemic Insecticide
For Foliar/Drench Applications for Insect Control in Greenhouse, Nursery and Interiorscapes

Rate: 50 mL (1.7 oz.) per 100 gallons (foliar) See label for drench.
Signal Word: Caution REI: 0 - 12 hours (read label)

Marathon II has foliar or drench applications. Marathon II applications should commence before intense insect pressure is present. Marathon II foliar applications have 14 to 28 days of control. Marathon II applied as a drench will provide 8 - 12 weeks of control. Refer to the Marathon II label for correct drench application rates.

Marathon II is compatible with commonly used pesticides and foliar fertilizers. The use of a spreader/sticker is recommended for foliar sprays.

Shake well before using. Always read the label and product information bulletin prior to product use.

Azatin® XL - Insect Growth Regulator
For Indoor and Outdoor Use on Ornamentals and Vegetable Crops

Rate: 8 oz. per 100 gallons as a drench
Signal Word: Caution REI: 4 hours

Drench applications of Azatin XL insect growth regulator will control the pupal and larval stages of fungus gnats. After drench applications of Azatin XL are accomplished, apply an application of Decathlon 20 WP synthetic pyrethroid to control adult stages of fungus gnats. Repeat applications at 7 day interval. Refer to Azatin XL Fungus Gnat technical bulletin. Shake well before mixing. Always read the label.

Azatin is a registered trademark of Certis USA.

Decathlon™ 20 WP - Synthetic Pyrethroid
For Control of a Wide Range of Crawling and Flying Insect Pests on Ornamentals and Nursery Stock

Rate: 1.3 oz. per 100 gallons
Signal Word: Caution REI: 12 hours

Spray applications of Decathlon 20 WP synthetic pyrethroid will control the adult stages of fungus gnat. After spray applications of Decathlon 20 WP are accomplished, an application of Azatin XL insect growth regulator, to control larval and pupal stages of fungus gnats is suggested. Spreader stickers my enhance performance. Repeat applications at 7 day intervals. Always read the label.