Results 161 to 170 of about 162,335 (201)

Dynamics of Motion Perception in the Desert Locust

Science, 1964
The torque produced by the neck muscles of a locust mounted coaxially in an illuminated cylindrical striped drum follows small sinusoidal oscillations of the drum. Peak-to-peak oscillations of 0.03 degree (± 0.02 degree) at 0.1 cy/sec elicit measurable responses. Several features of this visual response to drum oscillation can be expected theoretically
openaire   +2 more sources

The Desert Locust: an international challenge

Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1990
Abstract A new plague of the Desert Locust Schistocerca gregaria started in 1986; it developed quickly in 1987 in the Sahelian countries and reached northwest Africa at the end of 1987. It expanded in 1988 in north Africa, the Sahel, the Sudan, the Near East, southwest Asia, and in October 1988, swarms crossed the Atlantic to the ...
R. Skaf, G. B. Popov, J. Roffey
openaire   +1 more source

An Albino Strain of the Desert Locust

Nature, 1957
DURING extensive laboratory breeding of the desert locust Schistocerca gregaria (Forskal), at the Chemical Defence Experimental Establishment, Porton, twelve albino hoppers (nymphs), creamy-white in colour, occurred among the normal heavily pigmented ones.
openaire   +1 more source

The Desert Locust

The Journal of Animal Ecology, 1973
Z. Waloff, Stanley Baron
openaire   +1 more source

Observations on gliding in the desert locust

Animal Behaviour, 1963
Summary 1. Observations on gliding flight by the Desert Locust in Eastern Africa and Arabia are recorded. 2. It is shown that gliding is a not uncommon feature of adult behaviour; it has been recorded among fledglings, immature, and mature populations over a wide range of densities, and may be evinced by a considerable proportion of the ...
openaire   +1 more source

Desert locust control strategies

1997
Summary The problems of combating desert locust upsurges change as an upsurge develops. The initial outbreak occurs with little warning and so must be fought by attacking nymphal infestations with the resources on hand. The ultra low volume nymphal target blocks are difficult to define at all stages of an upsurge.
openaire   +1 more source

Meteorology and Desert Locust Forecasting1

EPPO Bulletin, 1983
The now very considerable understanding of weather effects on breeding and movement by the desert locust has been used to prepare a forecasting manual. It is a two‐volume, 400‐page publication that describes, explains and illustrates the principles of modern forecasting, and includes not only much material on the biology and ecology of this species but
openaire   +1 more source

Strategies to combat the desert locust

Crop Protection, 1992
Abstract During the recent desert locust plague some 15 × 106 1 of ULV-formulated pesticide, as well as minor amounts of emulsifiable concentrate (EC) materials and poisoned bait, were applied, at a cost of US$200 × 106 in donor assistance alone, but to doubtful effect. None of the strategies that aim to prevent plagues are likely to succeed.
openaire   +1 more source

Detecting Desert Locust Breeding Grounds: A Satellite-Assisted Modeling Approach

Remote Sensing, 2021
Clay Blankenship, Jonathan L Case, Vikalp Mishra   +2 more
exaly  

DESERT LOCUSTS: East Africa

Africa Research Bulletin: Economic, Financial and Technical Series, 2020
  +5 more sources