2 edition of Ecological studies on oviposition by swarms of the desert locust (Schistocerca gregaria Forskål) in Eastern Africa found in the catalog.
Ecological studies on oviposition by swarms of the desert locust (Schistocerca gregaria Forskål) in Eastern Africa
G. B. Popov
Includes bibliographical references (p. 68-70).
|Statement||by G.B. Popov.|
|Series||Anti-locust bulletin -- 31.|
|Contributions||Anti-Locust Research Centre (Great Britain)|
|The Physical Object|
|Pagination||70,  p. :|
|Number of Pages||70|
After the pioneer studies by Pedgley 44 and Hielkema, 45, 64 remote sensing has been used for finding and mapping emerging vegetation in the desert to help monitor and forecast the desert loc 56, 66, 68, 69 and the Australian plague locust. 46, 49, 51, 72 – 82 The tool allows assessing the ecological conditions favorable for locust. The United Nations Environmental Programme explains how a changing climate is worsening desert locust swarms in East Africa: During quiet periods—known as recessions—desert locusts are .
Ecological studies on oviposition by swarms of the Desert Locust (Schistocerca gregaria) in Eastern Africa Popov, Popov Note on the frequency and rate of oviposition in swarms of the Desert Locust . Popov GB, Ecological studies on oviposition by Locusta migratoria migratorioides (R. & F.) in its outbreak area in the French Sudan. Locusta no. 6: Popov GB, Report of the special .
Study Area. The study took place in Mauritania, one of the key countries for the implementation of preventive control and hosting Desert Locust permanent habitats (Popov et al. ).The country is also historically an important locust migration route between the Sahel and the Maghreb in Africa (Ceccato et al. ).The study . The desert locust (Schistocerca gregaria, Forska˚l) has the ability to change its behavior and physiology, in particular its appearance, in response to environmental conditions, and transform itself from a harmless solitarious individual to part of a collective mass of insects that form a cohesive swarm .
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The following is almost entirely the author's summary. The behaviour of swarming adults of Schistocerca gregaria (Forsk.) during reproduction was studied in relation to environmental conditions at some 30 sites in Eritrea Cited by: Ecological studies on oviposition by swarms of the desert locust (Schistocerca gregaria Forskål) in eastern Africa.
Anti-Locust Bull. – Google ScholarCited by: Notes on the behaviour of swarms of the desert locust (Schistocerca gregaria Forskål) during oviposition in Iran Article in Ecological Entomology (4) - 77 April with 14 Reads. The desert locust (Schistocerca gregaria, Forskål) has the ability to change its behavior and physiology, in particular its appearance, in response to environmental conditions, and transform itself from a harmless solitarious individual to part of a collective mass of insects that form a cohesive swarm.
Ecological studies on oviposition by swarms of the desert locust (Schistocerca gregaria Forskål) in eastern Africa.— Anti-Locust Bull. 31, 70 by: The full text of this article hosted at is unavailable due to technical difficulties. Thus, mating desert locust males remain in physical contact with the female after the separation of the genitalia until oviposition has taken place (Popov,Stower et al., Under conditions of high local competition for mates, as in S.
gregaria swarms, the most important precopulatory trait to avoid take-overs. G.B PopovEcological studies on oviposition by swarms of the desert locust, (Schistocerca gregaria Forskal) in Eastern Africa Anti-Locust Bull., 31 (), pp.
Google Scholar. Field studies on factors affecting the displacements of desert locust swarms in eastern Africa.— Anti-Locust Bull.
9, 1 – Several species of grasshoppers swarm as locusts in different parts of the world, on all continents except Antarctica and North America: For example, the Australian plague locust (Chortoicetes terminifera) swarms across Australia. The desert locust. Oviposition responses of gregarious adult gravid females of the desert locust Schistocerca gregaria to sand previously used for oviposition by gregarious females (contaminated sand, with eggs and froth removed) and to sterilized sand (noncontaminated sand) were compared in bioassays.
Gregarious females preferentially oviposited into contaminated sand. Biological Control of Locusts and Grasshoppers. cloud to control desert locust swarms (), Ecological studies on many species have shown that a suite. In the late eighties large-scale control operations were carried out to control a major desert locust upsurge in Africa.
For the first time since the banning of organochlorine pesticides these operations relied mainly on non-persistent pesticides such as organophosphates and pyrethroids. The amount of pesticides sprayed and the area covered were probably the highest in the history of locust.
The following is based on the authors' summary of the three studies reported. The variations in the number of eggs per pod laid by females of Schistocerca gregaria (Forsk.) in egg-fields in eastern Africa and Arabia are considered in relation to the history of the population, environmental.
“The desert locust live for a maximum of two-and-a-half months to five months. The present swarms have already completed three-and-a-half months of their life cycle.
Hence their. Pheromones in relation to aggregation and reproduction in desert locusts HANS-JO¨RG FERENZ andKARSTEN SEIDELMANN InstituteofZoology,AnimalPhysiology,Martin-Luther-University,Halle. Researchers studying swarm behavior of the South American locust Schistocerca cancellata find that the insects’ local population density triggers a phase shift that includes both behavioral and physical changes in the locusts.
In a lab, the researchers raised the locust. Bahana Figure 2 Frequency of swarm formation in Red Locust outbreak areas in –97 (courtesy: A. Gadabu).
evidence (Symmons, ). Research efforts in outbreak areas have. Juvenile hormones (JH) are key endocrine regulators produced by the corpora allata (CA) of insects. Together with ecdysteroids, as well as nutritional cues, JH coordinates different aspects of.
agro- economy like, the outbreak of the Desert locust in –, over 8 million African people victimized with 80 to % agro economy losses .
And over billion US Dollars were invested to fight locust outbreak in 22 countries . In Queensland 73 hectares being sprayed to combat outbreak of migratory locust. Inside the battle against the Desert Locust (5 Eight million square kilometres of territory must be monitored for Desert Locust during the current upsurge, an area shown here in relation to the continental United States.
Coordinators in Locust .Locusts are species of short horned grasshopper of the family Acrididae that sometimes form very large group and swarms. The migratory locusts swarms consist of mobile insects originated from low .From the Biblical plagues of Egypt to a major infestation in Madacasgar two years ago, locust swarms have caused chaos throughout history.
Just one swarm can cover 20% of the land surface of the .