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Biological control or biocontrol is a method of controlling pests, whether pest animals such as insects and mites, weeds, or pathogens affecting animals or plants by using other organisms. It relies on predation, parasitism, herbivory, or other natural mechanisms, but typically also involves an active human management role. It can be an important component of integrated pest management (IPM) programs.
Whiteflies are Hemipterans that typically feed on the undersides of plant leaves. They comprise the family Aleyrodidae, the only family in the superfamily Aleyrodoidea. More than 1550 species have been described.
Thrips are minute, slender insects with fringed wings and unique asymmetrical mouthparts. Entomologists have described approximately 7,700 species. They fly only weakly and their feathery wings are unsuitable for conventional flight; instead, thrips exploit an unusual mechanism, clap and fling, to create lift using an unsteady circulation pattern with transient vortices near the wings.
The silverleaf whitefly is one of several species of whitefly that are currently important agricultural pests. A review in 2011 concluded that the silverleaf whitefly is actually a species complex containing at least 40 morphologically indistinguishable species.
The broad mite, Polyphagotarsonemus latus, is a microscopic species of mite found on many species of plants, spanning 60 families including important agricultural species such as cotton, soybean, blackberries, strawberries, peppers, and other fruits. Broad mites are also currently affecting cannabis plants, as the industry matures with legalization. The mites are found in many areas worldwide and are major greenhouse pests.
The Phytoseiidae are a family of mites which feed on thrips and other mite species. They are often used as a biological control agent for managing mite pests. Because of their usefulness as biological control agents, interest in Phytoseiidae has steadily increased over the past century. Public awareness of the biological control potential of invertebrates has been growing, though mainly in the US and Europe. In 1950, there were 34 known species. Today, there are 2,731 documented species organized in 90 genera and three subfamilies.
Stratiolaelaps scimitus is a small (0.5 mm) light brown mite that lives in the top 1⁄2 inch (13 mm) layer of soil. As a natural predator of fungus gnat pupae and of the snail parasite Riccardoella limacum it is used by gardeners and snail breeders for biological pest control. Stratiolaelaps scimitus is also commonly used by reptile, amphibian and invertebrate keepers as a preventative or reactive measure against grain mites and reptile mites. Whereas most mite treatments are based on synthetic chemicals, predatory mites are used as a biological method of preventing and curing mite infestations.
The western flower thrips [Frankliniella occidentalis (Pergande)] is an invasive pest insect in agriculture. This species of thrips is native to the Southwestern United States but has spread to other continents, including Europe, Australia, and South America via transport of infested plant material.
Thrips palmi is an insect from the genus Thrips in the order Thysanoptera. It is known commonly as the melon thrips.
Phytoseiulus is a genus of mites in the Phytoseiidae family. A predatory mite, this is the mite predator most frequently used to control two-spotted spider mites in greenhouses and outdoor crops grown in mild environments. This mite was accidentally introduced into Germany from Chile in 1958; it was subsequently shipped to other parts of the world, including California and Florida, from Germany. A Phytoseiulus mite can consume up to seven adult spider mites or several dozen of their eggs in a day. Adult females are reddish, pear-shaped, about 0.5 mm (0.020 in) long, and active at room temperature. Immatures and males are smaller and lighter in color. Eggs are oblong. About 80% are females. At optimum temperatures, Phytoseiidae can develop from egg to adult in seven days and live up to a month. A well-fed female lays about 50 eggs in her lifetime.
Orius insidiosus, common name the insidious flower bug, is a species of minute pirate bug, a predatory insect in the order Hemiptera. They are considered beneficial, as they feed on small pest arthropods and their eggs. They are mass-reared for use in the biological control of thrips.
Neoseiulus californicus is a predatory mite that feeds on Tetranychid mites. This species was first described on lemons from California under the name Typhlodromus californicus in 1954.
Neoseiulus cucumeris, the cucumeris mite, is a species of predatory mite in the family Phytoseiidae. It is used in biological pest control of western flower thrips in cucumber and some other greenhouse crops.
Dicyphus hesperus is a species of true bug in the family Miridae. It is a generalist predator of other insects and also feeds on plant tissues. It is native to North America and has been used there in biological control of agricultural pests, especially whitefly on tomatoes.
Macrolophus caliginosus is a species of true bug in the family Miridae. It is omnivorous and both preys on insects and feeds on plant tissues. It is used in Europe in the biological control of whitefly in tomatoes grown under glass.
Frankliniella schultzei, the common blossom thrips or cotton thrips, is a species of thrips in the family Thripidae. It is found in many parts of the world and is an important pest insect in agriculture.
Echinothrips americanus is a species of thrips in the family Thripidae. It is found in North America, Europe, and Asia. E. americanus was first described in 1913 by entomologist A.C. Morgan in Quincy, Florida, where he found the insect on a Veratrum viride plant. Suggested common names include Poinsettia thrips and Impatiens thrips. Since their spread throughout Europe as early as 1995, and subsequently China, E. americanus has been called an "upcoming pest."
Neothrips is a genus of thrips in the family Phlaeothripidae. According to Kirk and Terry (2003), Neothrips fasciatus, also known as the greenhouse thrips, is a major pest of greenhouse crops worldwide, causing damage to leaves, flowers, and fruits, and transmitting plant viruses. Similarly, Mound and Tree (2016) reported the discovery of a new species within the genus, Neothrips quasimodo, in Australia.
Aschersonia aleyrodis is a fungal pathogen affecting various species of insect. It has been shown to control the silverleaf whitefly in laboratory and greenhouse conditions.
References
- ↑ Messelink, Gerben (2005). "Typhlodromips swirskii (Athias-Henriot) (Acari: Phytoseiidae): a new predator for thrips control in greenhouse and indoor grown crops". Integrated Control in Protected Crops, Temperate Climate IOBC/WPRS Bulletin. 28 (1): 183–186.
- 1 2 3 4 5 "Amblyseius swirskii: swirski mite". Featured Creatures. University of Florida. Retrieved 11 April 2017.
- ↑ van Maanen, R.; Vila, E.; Sabelis, M.W.; Janssen, Arne (2010). "Biological control of broad mites (Polyphagotarsonemus latus) with the generalist predator Amblyseius swirskii". Experimental and Applied Acarology. 52 (1): 29–34. doi:10.1007/s10493-010-9343-2. PMC 2914298 . PMID 20191312.
- ↑ Kakkara, Garima; Kumarb, Vivek; Sealc, Dakshina R.; Liburdd, Oscar E.; Stanslye, Philip A. (2016). "Predation by Neoseiulus cucumeris and Amblyseius swirskii on Thrips palmi and Frankliniella schultzei on cucumber". Biological Control. 92 (1): 85–91. doi:10.1016/j.biocontrol.2015.10.004.