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The distinctive Megaselia deltomera Schmitz, 1924 [Diptera: Phoridae] belongs to a compex of sibling species

100%

Henry R. , Disney L.

Annales Zoologici

2004

tom 54

nr 4

Megaselia anticheira sp. nov. from Oman and Yemen, M. epandquadrata sp. nov. from Yemen, M. gouteuxi sp. nov. from Ivory Coast, Oman and Yemen and M. nussbaumj sp. nov. from Israel and Yemen are described. A neotype from Israel is designated to replace the lost holotype of M. deltomera (Schmitz, 1924) from Croatia. The first Old World females of this complex are described and keys to the six Old World species are provided.

Annual balance of biomass, nitrogen, and phosphorus stocks of the tropical aquatic macrophyte Echinochloa polystachya [H.B.K.] Hitchcock [Poaceae] in the Jurumirim Reservoir [Sao Paulo, Brazil]

80%

Pompeo M. L. M. , Moschini-Carlos V. , Henry R.

Acta Hydrobiologica

1999

tom 41

nr 2

Measurement and classification methods using the ASAE S572.1 reference nozzles

61%

Fritz B. K. , Hoffmann W. C. , Czaczyk Z. , Bagley W. , Kruger G. , Henry R.

nr 4

An increasing number of spray nozzle and agrochemical manufacturers are incorporating droplet size measurements into both research and development. Each laboratory invariably has their own sampling setup and procedures. This is particularly true about measurement distance from the nozzle and concurrent airflow velocities. Both have been shown to significantly impact results from laser diffraction instruments. These differences can be overcome through the use of standardized reference nozzles and relative spray classification categories. Sets of references nozzles, which defined a set of classification category thresholds, were evaluated for droplet size under three concurrent air flow velocities (0.7, 3.1 and 6.7 m/s). There were significant, though numerically small, differences in the droplet size data between identical reference nozzles. The resulting droplet size data were used to categorize a number of additional spray nozzles at multiple pressure and air flow velocities. This was done to determine if similar classifications were given across the different airspeeds. Generally, droplet size classifications agreed for all airspeeds, with the few that did not, only differing by one category. When reporting droplet size data, it is critical that data generated from a set of reference nozzles also be presented as a means of providing a relative frame of reference.