The behavioral plasticity of locusts is a striking trait presented during the reversible phase transition between solitary and gregarious individuals. However, the results of serotonin as a neurotransmitter from the migratory locust Locusta migratoria in phase transition showed an alternative profile compared to the results from the desert locust Schistocerca gregaria. In this study, we investi...

Current paradigms generally assume that increased plant nitrogen (N) should enhance herbivore performance by relieving protein limitation, increasing herbivorous insect populations. We show, in contrast to this scenario, that host plant N enrichment and high-protein artificial diets decreased the size and viability of Oedaleus asiaticus, a dominant locust of north Asian grasslands. This locust ...

Swarming and the expression of phase polyphenism are defining characteristics of locust species. Increases in local population density mediate morphological, physiological and behavioural changes within individuals, which correlate with mass marching of juveniles in migratory bands and flying swarms of adults. The Australian plague locust (Chortoicetes terminifera) regularly forms migratory ban...

Wings and legs of the gregarious desert locust, Schistocerca gregaria have been shown to be release sites of phenylacetonitrile (PAN), the major adult male-produced pheromone. However, there is limited information on the distribution of PAN within the locust. Here we show, using gas chromatography-mass spectrometry (GC-MS), that PAN occurs in nearly all body parts of both adult males and female...

1. scylloInositol has been identified as a component of locust haemolymph, where it occurs in concentrations of 0.2-0.4mg./ml. 2. A simple method for the identification of scylloinositol is described. This has been used to demonstrate the presence of scylloinositol in five other insect species. 3. Locust phospholipids contain myoinositol but no scylloinositol. 4. Radioactivity from [(14)C]gluco...

........................................................................................................................... V Introduction ..................................................................................................................... 1 Development of the insect nervous system .......................................................................... 3 Organization of the ...

Knowledge of the flowering dates black locust trees (Robinia pseudoacacia L.) is crucial information both economic significance and scientific interest. Black in fact an excellent melliferous plant can provide on climate change impacts due to its large distribution throughout world as planted naturalized trees. This paper presents calibration validation a phenological model targeted at simulati...

This paper deals with comparative studies of bending behavior untreated and modified European beech (Fagus sylvatica L.), oak (Quercus spp.) black locust (Robinia pseudoacacia L.). The modification the woods included both ammonia treatment in combination mechanical densification. For each treatment, pure gaseous was used. investigations were conducted by means three-point tests. bulk density in...