C/U of a locust on a plant. Several shots of the roof garden above the department store of Derry and Toms (aka Kensington Roof Gardens); people wander around and sit on benches.
In a laboratory in London we see several experiments on locusts by scientists researching methods of locust control - or extermination! Various shots of the creatures crawling, mating and laying eggs, being tantalised with the scent of grass and being hung in a wind tunnel to be examined in flight.
In a laboratory office a man tears a sheet from a printing machine and discusses it with a colleague; the man looks at a map of Israel and Jordan, measures with callipers and makes a mark on it.
Various shots of locusts on trees and flying about a field.
Note: cameraman's notes on file say this laboratory is a British Government Department, under the Ministry of Overseas Development. Cuts exist - see separate record.