Desert Locusts, Schistocerca gregaria (Forskal), are the most dangerous of locust species. Under favorable environmental conditions, a few solitary individuals can dramatically multiply, form large swarms able to migrate great distances, and threaten agriculture over a large part of Africa, the Middle East and Southwest Asia. There have been six plagues of Desert Locusts this century, one of wh...

Steve Simpson was born and grew up in Australia. After completing his undergraduate degree at the University of Queensland, he travelled to London where he undertook his PhD on locust feeding physiology. Steve then spent 22 years in Oxford, fi rst in Experimental Psychology and then in the Department of Zoology and the Natural History Museum, before being enticed back to Australia in 2005. Toge...

The dorsal ocelli are commonly considered to be incapable of form vision, primarily due to underfocused dioptrics. We investigate the extent to which this is true of the ocelli of the locust Locusta migratoria. Locust ocelli contain thick lenses with a pronounced concavity on the inner surface, and a deep clear zone separating retina and lens. In agreement with previous research, locust ocellar...

The aim of this research is to measure the energy consumption and compare cutting performance three types battery-powered chainsaws (Stihl MSA 200, Stihl 220, 300). Tested were powered by two different battery packs AP 300 S 500 S) with capacity output current when wooden beams, European beech (Fagus sylvatica L.) black locust (Robinia pseudoacacia densities moisture content. Energy was measure...