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Zonocerus variegatus

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description Zonocerus variegatus Overview

Zonocerus variegatus, commonly called the variegated grasshopper, is a brightly patterned member of the family Pyrgomorphidae found in tropical Africa. It feeds on many plants and can become a serious agricultural pest, particularly on cassava, but also on crops such as maize, plantain, vegetables, and legumes. Its conspicuous coloration is associated with chemical defense, and populations may acquire toxic compounds by feeding on certain plants.

help Zonocerus variegatus FAQ

Does the variegated grasshopper migrate in massive flying swarms?

Unlike true locusts, Zonocerus variegatus is completely flightless and does not form massive, high-altitude migratory swarms. Instead, it moves in dense, marching bands of flightless nymphs that walk across the landscape devouring crops in West and Central Africa.

Why is the variegated grasshopper so dangerous to cassava crops?

This pest is notorious for devastating cassava and plantain crops, primarily because it is one of the few insects that can tolerate the highly toxic cyanogenic compounds in the plants. By defoliating the cassava, they severely stunt the growth of the plant's starchy tuber, which is a vital subsistence crop.

Is Zonocerus variegatus toxic to its natural predators?

Yes, the variegated grasshopper features bright yellow, black, and orange aposematic coloration that warns predators it is highly poisonous. It sequesters toxic compounds from the various weeds and plants it consumes, making it unpalatable to most birds and reptiles.

How do farmers control Zonocerus variegatus infestations?

Because the insects aggregate heavily on specific host plants, farmers can often manage them by physically hand-picking the nymphs or burning agricultural waste where they lay their eggs. Chemical control with specific insecticides is also used during severe outbreaks to protect vulnerable subsistence crops.

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