Who Am I? Very high populations can develop within three to four weeks. For example, in the family Cucurbitaceae, vegetables such as watermelon and squash contract squash vein yellowing virus (SqVYV) by the silverleaf whitefly. Bemisia tabaci.  However, differences in climate preference by these wasps reduced their effect. Several species of whiteflies may infest eggplants, but silverleaf whitefly is the primary one. 1999. DP: diagnostic protocol. California produces approximately 90% of the United States’ winter vegetable crop, and has incurred an estimated $500 million in crop damage due to silverleaf whitefly populations. An indigenous strain of the whitefly of low pest status has been present in northern Australia for many years and has been known by the common names of sweet potato, cotton or tobacco whitefly. However, in 1986 in Florida, the insect we called Bemisia tabaci became an extreme economic pest. This plant is listed by the U.S. federal government or a state.  When spore solutions of V. lecanii are sprayed on eggs of B. tabaci approximately 89% to 90% of these eggs are killed.  On the other hand, A. aleyrodis only infects and destroys nymphs and pupae. SILVERLEAF WHITEFLY. The Biology and Management of Silverleaf Whitefly, The sweetpotato or silverleaf whiteflies: biotypes of, Biological Control: A Grower's Guide to Using Biological Control for Silverleaf Whitefly on Poinsettias in the Northeast United States. The two most important are the silverleaf, MEAM1 or B biotype, and the Q or Mediterranean (MED)biotype. Basics. , Classical biological control has been the best long-term, sustainable solution to controlling these exotic pests.  Silverleaf whiteflies are actually more attracted to the squash crop than they are to the tomato plant. University of Georgia. Bemisia tabaci. Sticky cards are often hung in greenhouses to attract and capture adult Whiteflies, preventing them from harming plants. Field studies conducted in Australia have shown that the use of floating row covers coupled with insect growth regulators increase the yield of harvested fruit and quality and reduce virus damage to cucurbits. Nonetheless, they can still fly from one plant to another, but this is only the case when you disturb them. They have white wings and yellow bodies, and congregate on the undersides of leaves. University of California. It was found that the use of the biological controls and insect growth regulators produces a higher predator-to-prey ratio. Predators, parasitoids, and pathogens specific to whiteflies can keep populations under control. University of Hawaii. silverleaf whitefly, sweetpotato whitefly. Whiteflies are pests which are commonly found on indoor plants, in greenhouses, and on tomato crops. Silverleaf Whitefly FACTS, IDENTIFICATION & CONTROL LATIN NAME Bemisia argentifolii APPEARANCE. Stem girdlers are ring-barking weevils involving at least three weevil species causing sporadic damage in all lychee/longan districts. All Whiteflies are unable to survive cold temperatures. Texas State University System. Electronic Data Information Source Publication #ENY129, National Invasive Species Information Center, Pest Tracker - Survey Status of Sweetpotato Whitefly, YouTube - The Silverleaf Whitefly Problem in Georgia, Plantwise Technical Factsheet - Silverleaf Whitefly (, Plant Pest Factsheet - Tobacco, Sweet Potato or Silver Leaf Whitefly (2017) (PDF | 295 KB), Primefact - Silverleaf Whitefly in Vegetables (Dec 2009), A-Z List of Horticultural Insect Pests: Silverleaf Whitefly, UC Pest Management Guidelines - Silverleaf Whitefly on Peppers (Nov 2012). This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. Adult Description: Even though this species is called a whitefly Bemisia argentifoliiis not a Dipteran (fly) insect. Image Gallery. Q-Biotype. The best studied of these whitefly parasitoids are Encarsia formosa and Eretmocerus eremicus, both of which are commercially available. New South Wales Department of Primary Industries (Australia). , Cultural controls are very important to crops such as vegetables and fruit. Bemisia tabaci, silverleaf whitefly, is a pest of many agricultural and ornamental crops. It transmitted new plant-pathogenic viruses that had never affected cultivated crops and in… Image Gallery. A review in 2011 concluded that the silverleaf whitefly is actually a species complex containing at least 24 morphologically indistinguishable species.. This yellow-greenish bodied moth-like insect grows to about .8mm and has snow-white wings because of wax secretions on its body and wings. An introduced whitefly species, responsible for over a half billion dollars in damage to U.S. agricultural production in 1991, is morphologically indistinguishable from Bemisia tabaci (Gennadius). The ability of the whitefly to adapt to various plants facilitates the spread of dangerous plant viruses, which these insects are notorious for transmitting. B. bassiana is only an effective biological control agent in conditions of low temperatures (maximum of 20 °C) and a humidity level greater than 96%. Currently, the most effective oil in the market is the ultra-fine oil, which is a paraffinic oil product that reduces the settlement of the adult flies, decreases oviposition, and abates the transmission of the tomato yellow leaf curl virus. Description. A County Agent's Guide to Insects Important to Agriculture in Georgia. Common Name: Silverleaf whitefly Scientific Name: Bemisia argentifolii Bellows & Perring Order: Homoptera. Adult whiteflies are approximately four times the size of the egg, with light yellow bodies and white wings, which is attributed by the secretion of wax across its wings and body.  The SqVYV virus discovered by plant pathologist Benny Bruton and Shaker Kousik is essentially a crippling disease of the watermelon, which leads to the vine of the watermelon to collapse, causing the death of the watermelon before harvest. , This species of whitefly is a particularly devastating pest because it feeds on over 500 plant species. The white wings fold over the bodies while at rest. Scientific Name. Planting different host crops away from each other will decrease the number of plants the flies will be able to infect. Van Driesche, and J.S. Much of the success of this biological control on B. tabaci has been conducted in the laboratory. The first instar …  This hormone is a juvenile hormone analogue, which affects hormonal balance and chitin in immature insects, and causes deformation and death during molting and pupation. High priority pest of: Cotton, Melons, Production nurseries, Vegetables. The B biotype is also referred to as … Scientific Name. This was done by releasing six female parasitoids per week for the first half of the growing season, and only one female per week for the remaining of the season. Other plants that can serve as trap crops include cantaloupe and cucumber. Start studying Scientific Names of Invasive Species: Animals. Adults hold their wings vertically tilted, like a peaked roof. Female B. tabaci will lay 50 to 400 eggs ranging from 0.10 mm - 0.25 mm on the under part of leaves. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. In severe cases, they can lead to the death of their host. Immature stages begin with a pointed oblong yellow egg (0.2 mm) which darkens at the apex just before hatching.  Some strains of whitefly have developed resistance to its fungal pathogens including V. lecanii.  The mobile nymph walks to find a suitable area on the leaf with adequate nutrients and molts into an immobile stage. Adult silverleaf whiteflies are tiny – typically 1.5 mm in length. Scientific name: Bemisia tabaci Biotype B, Q and AN. The Encarsia formosa "Beltsville Strain", however, has been unsuccessful in control B. tabaci biotype B in commercial greenhouses; it is only able to control the species in small experimental greenhouses. Bemisia tabaci. This B biotype is known as the Silverleaf Whitefly (SLW), because of its unique ability to cause 'silverleaf' disorder in squash, and in 1994 it was described as a new species, Bemisia argentifolii Bellows & Perring, although many scientists still prefer the name Bemisia tabaci … Olive oil is also highly effective in controlling the number of whiteflies. Another species, the Silverleaf Whitefly, molts out of its exoskeleton, leaving behind a silvery shell of its former self. The name can be confusing since they are not actual flies.  There are currently four species of predators that are commercially available for control of B. tabaci: Delphastus pusillus, Macrolophus caliginosus, Chrysoperla carnea, and C. University of Florida IFAS. SLW is a serious pest of many vegetables including cucurbits, tomatoes, eggplant, brassicas, lettuce and beans.  Plants which are affected by the whitefly include: tomatoes, squash, poinsettia, cucumber, eggplants, okra, beans, and cotton. Who Am I? 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