That would be difficult to say. Climatic conditions cause the plagues. Locust invasions are controlled with pesticides.
Entomophagy (from Greek ἔντομον éntomon, "insect", and φᾰγεῖν phagein, "to eat") is the consumption of insects as food. Insects are eaten by many animals, but the term is generally used to refer to human consumption of insects; animals that eat insects are known as insectivores. There are also some species of carnivorous plants that derive nutrients from insects.
Human insect-eating is common to cultures in most parts of the world, including North, Central and South America; and Africa, Asia, Australia and New Zealand. Over 1,000 species of insects are known to be eaten in 80% of the world's nations. However, in some societies insect-eating is uncommon or even taboo. Today insect eating is rare in the "developed" world, but insects remain a popular food in many "developing" regions of Latin America, Africa, Asia and Oceania. Locust
The desert locust (Schistocerca gregaria) is a species of locust. Plagues of desert locusts have threatened agricultural production in Africa, the Middle East, and Asia for centuries. The livelihood of at least one-tenth of the world’s human population can be affected by this voracious insect. The desert locust is potentially the most dangerous of the locust pests because of the ability of swarms to fly rapidly across great distances. It has two to five generations per year. The last major desert locust upsurge in 2004–05 caused significant crop losses in West Africa and had a negative impact on food security in the region. While the desert locust alone is not responsible for famines, it can be an important contributing factor.
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