Metarhizium spp. isolates from madagascar: Morphology and effect of high temperature on growth and infectivity to the migratory locust,Locusta migratoria

Entomophaga ◽  
1994 ◽  
Vol 39 (3-4) ◽  
pp. 351-361 ◽  
Author(s):  
M. Welling ◽  
G. Nachtigall ◽  
G. Zimmermann
Keyword(s):  
High Temperature ◽  
Locusta Migratoria ◽  
Migratory Locust

Heat Stress–Mediated Plasticity in a Locust Looming-Sensitive Visual Interneuron

2005 ◽  
Vol 93 (4) ◽  
pp. 1908-1919 ◽  
Author(s):  
Tomas G. A. Money ◽  
Michael L. Anstey ◽  
R. Meldrum Robertson
Keyword(s):  
High Temperature ◽  
Heat Shock ◽  
Action Potential ◽  
Locusta Migratoria ◽  
Firing Frequency ◽  
Neural Pathways ◽  
Movement Detector ◽  
Migratory Locust ◽  
Visual Interneuron ◽  
Contralateral Movement

Neural circuits are strongly affected by temperature and failure ensues at extremes. However, detrimental effects of high temperature on neural pathways can be mitigated by prior exposure to high, but sublethal temperatures (heat shock). Using the migratory locust, Locusta migratoria, we investigated the effects of heat shock on the thermosensitivity of a visual interneuron [the descending contralateral movement detector (DCMD)]. Activity in the DCMD was elicited using a looming stimulus and the response was recorded from the axon using intracellular and extracellular methods. The thoracic region was perfused with temperature-controlled saline and measurements were taken at 5° intervals starting at 25°C. Activity in DCMD was decreased in control animals with increased temperature, whereas heat-shocked animals had a potentiated response such that the peak firing frequency was increased. Significant differences were also found in the thermosensitivity of the action potential properties between control and heat-shocked animals. Heat shock also had a potentiating effect on the amplitude of the afterdepolarization. The concurrent increase in peak firing frequency and maintenance of action potential properties after heat shock could enhance the reliability with which DCMD initiates visually guided behaviors at high temperature.

scholarly journals SURVIVAL OF MIGRATORY LOCUST AT DIFFERENT KEEPING CONDITIONS

2020 ◽  
Author(s):  
A.B. Gerus ◽  
◽  
Y.S. Tokarev ◽  
G.R. Lednev ◽  
M.B. Levchenko ◽  
...  
Keyword(s):  
Survival Rate ◽  
Locusta Migratoria ◽  
Migratory Locust ◽  
Locusta Migratoria Migratorioides ◽  
Gregarious Locusts

In this article we studied the conditions for keeping two species of gregarious locusts: the African migratory locust (Locusta migratoria migratorioides) and the Asian migratory locust (Locusta migratoria migratoria) in open and shaded areas. Based on the data obtained, it is shown that the survival rate of insects of the non-diapausal subspecies was higher in comparison with the obligate monovoltine.

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