scholarly journals Radar Observations of Rain at Sydney, New South Wales

1953 ◽  
Vol 6 (2) ◽  
pp. 229 ◽  
Author(s):  
GA Day
Keyword(s):  
Cross Sections ◽  
New South ◽  
New South Wales ◽  
Radar Observations ◽  
South Wales ◽  
Radar Echoes

The radar echoes received from rain during systematic observations carried out from January 1950 to January 1951 at the Radiophysics Laboratory, Sydney, N.S.W., are illustrated and described. Examples of echoes from melting and upper bands, non-freezing and frontal showers, thunderstorms, and echo masses are shown by vertical cross sections of the atmosphere through the point of observation.

Cryptically galled infructescence: a new sheoak gall type in Allocasuarina luehmannii and Casuarina pauper (Casuarinaceae)

2020 ◽  
Vol 68 (5) ◽  
pp. 369
Author(s):  
Ian T. Riley
Keyword(s):  
Cross Sections ◽  
New South ◽  
New South Wales ◽  
Normal Cones ◽  
Regeneration Potential ◽  
Insect Galls ◽  
Affected Area ◽  
Abnormal Morphology ◽  
South Wales ◽  
Rare Instance

Insect galls formed within the infructescences (cones) of Allocasuarina luehmannii and Casuarina pauper in southern New South Wales, Australia, are described. The galling was internal within the infested cones, which were small and irregularly developed, but could appear superficially normal except that they had a higher than normal proportion of samaras retained on bracteole dehiscence. Cross-sections revealed abnormal morphology and wasp larval chambers. All exit holes found were between bracteole pairs of either fertile or infertile florets. Emergent wasps were tentatively identified as Eurytoma sp. sensu lato (Hymenoptera: Eurytomidae). These cryptically galled infructescences represent a previously undescribed gall type in the Casuarinaceae and, for Eurytoma, potentially a rare instance of phytophagy in Australia. Infested cones were found in a season when normal cones in this drought affected area were not easily found. It was concluded that this phytophagy could negatively impact the regeneration potential of two already compromised sheoak species.

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