Friday, April 6, 2012

Wheat Plants Insects

Numerous insects can attack wheat plants. The Hessian fly is the most destructive insect pest of wheat in the world.

Hessian fly 
Mayetiola destructor is a widespread pest. It is major pest of wheat throughout the important cereal growing regions of Europe and North America.

Mayetiola destructor can cause dwarfing of plants, reduction in tillering, increased winter injury and breaking of straw after ripening – in other words, many manifestations of lowered vitality can be observed in infected plants.

Damage in wheat is due entirely to feeding by larvae. The mouthparts of larvae are highly specialized mandibles that are thought to inject salivary secretions into the plant.

Wheat stem sawfly 
Cephus cinctus occurs in Canada and the US northward of Kansas. Damage results from breaking of infested stems and wheat with solid stems show only minor effects. Control efforts have been directed toward developing varieties with solid stems.

Adults appear during June: eggs inserted into plant stem just above joints. Larvae are stem borers and the species are injurious to grasses.

Cereal leaf beetle
Oulema melanopus causes widespread damage to small grains in many countries throughout the world. Larval and adult forms feed on the leaves, reducing grain yields or even killing the plant. Control efforts have included attempts to develop wheat varieties with characteristics which repel the insects.

It is a pest of cereal and a native of European was first recorded from Berien County Michigan, in 1962.
Wheat Plants Insects

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