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Sightings often placed their swarms in numbers far larger than any other locust species, with one famous sighting in 1875 estimated at 198,000 square miles (510,000 km 2) in size (greater than the area of California), weighing 27.5 million tons and consisting of some 12.5 trillion insects, the greatest concentration of animals ever recorded ...
Traditional locust control uses insecticides from the ground or air, but newer biological control methods are proving effective. Swarming behaviour decreased in the 20th century, but despite modern surveillance and control methods, swarms can still form; when suitable weather conditions occur and vigilance lapses, plagues can occur.
Locust swarms worldwide faced a steady decline in size from May to October 2020, as countries and intergovernmental organisations instituted extensive aerial and ground pest control efforts, aided by low quantities of rainfall in several affected regions, as well as the absence of storm activity in the Indian Ocean. By October 2020, Ethiopia ...
Rocky Mountain locust: Albert's swarm: 1875 United States: 3.5 – 12.5 trillion Rocky Mountain locust: 1915 Ottoman Syria locust infestation: 1915 Israel, Lebanon, and Syria: 2003–2005 Africa locust infestation: 2003–05 West Africa 2013 Madagascar locust infestation: 2013 Madagascar: billions migratory locust: January 2016 Argentine locust ...
The Locust Plague of 1874, or the Grasshopper Plague of 1874, occurred in the summer of 1874 when hordes of Rocky Mountain locusts invaded the Great Plains in the United States and Canada. The locusts swarmed over an estimated 2,000,000 square miles (5,200,000 km 2) and caused millions of dollars' worth of damage. Residents described swarms so ...
Locust have the ability to eat up to their own body weight in a single day. [13] Individuals gather in large groups called swarms, these swarms can range up to 80 million individuals that stretch 460 square miles. [13] Grasshoppers can cause major agricultural damage but not to the documented extent as locust historically have.
For example, over 250,000 hopper bands and 40,000 fledging adult swarms were controlled in the massive 1985–86 upsurge. Swarming populations can then perpetuate themselves for a number of years, requiring an intense control effort, before gradually dying out during another drought cycle."
Swarms can travel 5 to 130 km or more in a day. Locust swarms can vary from less than one square kilometre to several hundred square kilometres with 40 to 80 million individuals per square kilometre. An adult locust can consume its own weight (several grams) in fresh food per day. For every million locusts, one ton of food is eaten.