GREENHOUSE WHITEFLY
The greenhouse whitefly is a tiny (1/16 inch long insect that resembles a tiny moth). The almost microscopic, oblong, pale green to purple eggs are inserted into the lower leaf surface, often in a circle or crescent. The tiny nymph, yellow with red eyes, becomes a flat scale-like insect appressed to the lower leaf surface that grows to about 1/32 inch long.
leaves. Here they insert their eggs that hatch 5 to 7 days later. The new crawlers move about the plant for a day or two, often from leaf to leaf before inserting their mouthparts to feed. Once this occurs, they probably do not move again until mature. The crawlers molt into nymphs and then pupae. Finally, a new generation of whitish-yellow adults emerges. They are soon covered by a white, waxy bloom.
| Pesticide (Trade Name) : | Formulation | Directions for use | Restricted Entry Interval |
| acephate (Orthene Turf, Tree and Ornamental) [Outdoors Only] | 75% soluble powder: | 1 to 2 tsp per gallon of water. | Follow label directions |
| *azadirachtin (Azatin XL & others) | 3% emulsifiable concentrate: | 2/3 to 1 tsp per gallon of water Should be compatible with biological controls. |
Follow label directions |
| Beauveria bassiana (Naturalis-O) | 7.16% emulsifiable concentrate | 2 tsp to 2 tbsp per gallon of water. Three to 5 sprays needed for adequate control.Should be compatible with biological controls. |
4 hours |
| bifenthrin (Talstar) | 10% wettable powder | 1 1/4 to 5 3/4 tsp per gallon of water | Restricted Entry Interval |
| bifenthrin (Talstar) | 7.9% flowable | 1/2 to 2 1/2 tsp per gallon of water. | Follow label directions |
| bifenthrin (PT 1800 Attain) | 0.4% aerosol | Follow label directions | Follow label directions |
| cyfluthrin (Decathlon) | 20% wettable powder: | 1/4 tsp 1.9 oz | Follow label directions |
| diflubenzuron (Adept) | 25% water soluble powder: | 4 to 8 packets per 100 gallons of water. Apply at a volume of 1 gal of final solution per 200 square ft of bench area | 12 hours. |
| endosulfan (Thiodan) | 24.2% emulsifiable concentrate: | 2 tsp 2 pt 24 hr 50 wettable powder 1 tbsp 1 lb. | 24 hours. |
| fenoxycarb (Precision) | 25% wettable powder: | 2 to 4 oz per gallon of water. | Follow label directions |
| fenpropathrin (Tame) | 30% emulsifiable concentrate: | 2/3 tsp per gallon of water. | Follow label directions |
| *horticultural oil (Sunspray, Ultra-Fine Spray Oil) | 98.8% emulsifiable concentrate: | 2 1/2 to 5 Tbsp per gallon of water. Should be compatible with biological controls | 4 hours |
| imidacloprid (Marathon) | 1% granular: | 9 to 15 oz per 1,000 square ft or 1/3 tsp per 6-inch pot | 12 hours |
| *imidacloprid (Merit) | 60% wettable powder: | Follow label directions | Follow label directions |
| kinoprene (Enstar II) | 65.1% emulsifiable concentrate: | 1/2 to 2/3 tsp per gallon of water. | Follow label directions |
| methiocarb (PT 1700) Restricted Entry Interval: Follow label directions. | 1% aerosol: | Follow label directions | Follow label directions |
| lambda-cyhalothrin (Scimitar) | 10% water soluble powder: | 2 to 4 packets per 100 gallons of water. | 24 hours |
| *pyrethrins (Pyrenone)(PyGanic) | Follow label directions | ||
| pyrethrins (PT 1100 Pyrethrum) | 0.5%: aerosol: | Follow label directions. | Follow label directions |
| pyrethrins (PT 1600 X-clude) 0.3% aerosol: Follow label directions. Restricted Entry Interval: Follow label directions. | 0.3%: aerosol: | Follow label directions | Follow label directions |
| pyrethrins (PT 170 X-clude) | 1.1% Liquid: | 1 tbsp to 2 fl oz per gallon of water. | Follow label directions |
| pyridaben (Sanmite) | 75% wettable powder: | 4 to 6 oz per 100 gallons of water. Do not exceed 10.5 oz of product per acre per application. | 12 hours |
| soap (M-Pede, *Safers Insecticidal) | 49% emulsifiable concentrate: | 1 1/4 to 2 1/2 oz per gallon of water. Should be compatible with biological controls. | 12 hours |
| *soap (Olympic Insecticidal) | 25% emulsifiable concentrate: | Follow label directions | 12 hours |
| spiromesifen (Judo) | Greenhouse and Nursery; Follow label directions | 12 hours | |
| novaluron (Pedestal) | 10% SC | containerized material | 12 hours |
| See NC Pesticide Manual for more |
Recommendations for the use of chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by the North Carolina Cooperative Extension Service nor discrimination against similar products or services not mentioned. Individuals who use chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage and examine a current product label before applying any chemical. For assistance, contact an agent of the North Carolina Cooperative Extension Service in your county.
© 2001 NC Cooperative Extension Service
ENT/ort-10
May 2000 (Revised)
Web page last reviewed January, 2008 by the webperson.
