Are terminal chiasmata in male Schistocerca gregaria produced by telomere stickiness or by crossover processes?

Genetica ◽  
1978 ◽  
Vol 49 (2-3) ◽  
pp. 127-130 ◽  
Author(s):  
L. T. Douglas ◽  
D. F. Cupedo ◽  
R. M. Douglas
Keyword(s):  
Schistocerca Gregaria ◽  
Terminal Chiasmata

scholarly journals Haemolymph pigment composition as a chemometric indicator of phase in the desert locust, Schistocerca gregaria

1997 ◽  
Vol 17 (02) ◽  
pp. 199-204 ◽  
Author(s):  
Hassane Mahamat ◽  
Ahmed Hassanali ◽  
David Munyinyi
Keyword(s):  
Schistocerca Gregaria ◽  
Desert Locust ◽  
Pigment Composition

The toxicity of some insecticidal sprays to adult locusts

1962 ◽  
Vol 53 (3) ◽  
pp. 597-608 ◽  
Author(s):  
R. D. MacCuaig
Keyword(s):  
Schistocerca Gregaria ◽  
Droplet Diameter ◽  
Flight Activity ◽  
Spray Application ◽  
Single Drop ◽  
Flying Insects ◽  
Spray Droplets ◽  
Tentative Explanation

The toxicities of sprays of some insecticides used against locusts have been determined. The LD50's of γ BHC, diazinon, and dieldrin to both flying and settled adults of Schistocerca gregaria (Forsk.) were between 0·9 and 1·5 times those of the same formulations when applied as a single drop to the abdomen. The toxicity of these insecticides was not affected by the size of the spray droplets when these ranged from about 60 to 250 µ in diameter. The toxicity of DNC, however, was always less by spray application than when applied by micro-drop syringe and was affected by the droplet diameter (droplets of 100 µ being 1·5 times as toxic as those of 200–230 µ) and by whether the locusts were sprayed in flight or when tethered on a card (those in flight being about 1·6 times as susceptible to 100 µ droplets as those at rest). A tentative explanation of this effect is given.The speed of action of the insecticides was compared and the effects of flight activity on susceptibility to the insecticides when sprayed over the flying insects was examined, but none could be detected by the technique used.

Chromosome pairing in female and male diploid and polyploid anurans (Amphibia) from South America

1983 ◽  
Vol 25 (5) ◽  
pp. 487-494
Author(s):  
I. M. Rahn ◽  
A. Martinez
Keyword(s):  
South America ◽  
Genetic Control ◽  
Chromosome Pairing ◽  
Diploid Males ◽  
Terminal Chiasmata

Chromosome pairing in females and males of diploid (2n = 22) and tetraploid (2n = 44) Odontophrynus americanus and diploid Ceratophrys cranwelli (2n = 26) and tetraploid C. ornata (2n = 104) showed that diploid females formed more chiasmata per paired arm than diploid males and polyploids of both sexes. There was a reduction in the level of recombination in female polyploids by forming multivalents with terminal chiasmata. The reduction reflected a change in the genetic control of pairing in females after polyploidization.

Zur Regelung der Stellung des femur-Tibia-Gelenkes im Mesothorax der Wanderheuschrecke Schistocerca gregaria (Forsk�l)

1978 ◽  
Vol 29 (2) ◽  
pp. 83-96 ◽  
Author(s):  
I. Ebner ◽  
U. B�ssler
Keyword(s):  
Schistocerca Gregaria
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