Colorado potato beetle


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Colorado potato beetle:

see potato beetlepotato beetle,
name for two beetles of the leaf beetle family and for two of the blister beetle family, all destructive to the potato plant and its relatives. Most notorious is the Colorado potato beetle, or potato bug (Leptinotarsa decemlineata
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Colorado Potato Beetle

 

(Leptinotarsa decemlineata), an insect of the family Chrysomelidae, a dangerous quarantine pest of potatoes and other Solanaceae crops. The body is 9–11 mm long, oval, and yellow; each elytron has five black stripes; the wings are bright pink; the pronotum has black spots, of which the central one is V-shaped. The shiny light orange egg is oval and 2.4 mm long. The brick-red larva may reach 15 mm in length and has two black points along the sides of each segment except the first thoracic.

The Colorado potato beetle is native to North America. In Europe it first appeared in France in 1922 and subsequently spread to almost all countries. In the USSR it is distributed in Byelorussia, Latvia, Lithuania, Moldavia, the Ukraine, and the RSFSR. There are one or two generations a year. Adult beetles winter in the soil. Most surface in May and June, but some remain in diapause until spring.

The beetles eat leaves. They lay their eggs on the undersides of leaves of potato shoots, in groups of 15–20. A beetle may yield up to 3,000 eggs. Larvae in the first instar chew out the flesh of the leaf from below, and in the second instar, destroy all the flesh, leaving only the thick inner veins. The most voracious are larvae in the fourth instar, which pupate in the soil at the level of the plowed layer. In hot summer weather and in autumn before they hibernate, the beetles are capable of migrations of 40–300 km.

The Colorado potato beetle is an extremely flexible species that can survive various ecological conditions. It represents a particular threat to the USSR, because it can easily acclimatize and reproduce in all the principal regions of potato cultivation. Control measures include quarantine (plant quarantine) and treatment of plants with insecticides and insecticides mixed with micro-biological preparations when the larvae of the second in-star appear and when the beetles are hatching.

REFERENCES

Koloradskiizhuk i mery bor’bysnim, collections 1–2. Moscow, 1955–58. Iakovlev, B. V. Koloradskii kartofel’nyi zhuk. Riga, 1960.
Ekologiia ifiziologiia diapauzy koloradskogo zhuka: Sb. Moscow, 1966.

B. V. IAKOVLEV

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Many industry experts believe that the impact of eliminated chemicals could be devastating, especially in combating such pests as the Colorado potato beetle, Medfly and Scirtothrip.
Combinations of several insecticides used for integrated control of Colorado potato beetle (Leptinotarsa decemlineata Say.
In almost two decades since, my experience with Colorado potato beetle in every season has remained exactly the same.
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OTCBB: TNRL) today announced promising results obtained from field efficiency trials conducted on its fungal bio-insecticide, Beaveria Bassiana, for control and elimination of the Colorado Potato Beetle.
Bad weather that blows the roofing off of buildings, a favorite horse with a broken leg, deer knocking down the fence so animals got loose on the road (I live about 20 yards off what is now a four lane highway), and the infamous Colorado potato beetle.
Dickens and his colleagues have already identified volatiles released by potato plants that attract the Colorado potato beetle and a male-produced aggregation pheromone--one that attracts both sexes for feeding and mating.
Although such selective products are available, Horton says this approach leaves the door open for secondary pests, such as the Colorado potato beetle.
Other products of Monsanto's plant biotechnology development efforts include the NewLeaf(TM) potato plant, which does not require chemical insecticides for protection against the Colorado potato beetle.

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