Screening of Rootstocks for Citrus Blight Tolerance in South Africa-Preliminary Results

Screening Citrus Rootstocks and Related Selections in Soil and Solution Culture for Tolerance to Low-iron Stress

A broad range of plant selections across the orange subfamily Aurantioideae were screened in solution and soil culture for their tolerance to low iron (Fe) stress. Young seedlings grown in soil were transferred to tubs of +Fe nutrient solution, which was later replaced after a brief period with a –Fe solution. Over several trials, ’20 white root tips were harvested periodically from the plants ...

Reaction of citrus rootstocks to Meloidogyne javanica.

The response of Citrus spp. and related rootstocks to a population of Meloidogyne javanica was evaluated in a screenhouse experiment. Palestine and Rangpur lime, rough lemon, sour orange, Sexton and Thentriton tangelo, and Volkamer lemon were not infected by M. javanica. Galls and tip swellings were observed on the roots of Poncirus triloliata and Troyer citrange. There was no evidence of nemat...

Screening for chronic diseases in South Africa.

Morphological Description of Three Potential Citrus Rootstocks

Morphological studies showed that tree shape in Bitter sweet orange and Yuma citrange was spheroid with spreading growth habit and wide branch angle. Leaves were simple with dark green color, medium size and brevipetiolate in Sour orange while Yuma citrange had trifoliate leaves with medium and green color. Bitter sweet orange had the highest leaf lamina length (10.4 mm) than other rootstocks. ...

Phased implementation of screening for cryptococcal disease in South Africa.

Cryptococcus neoformans is the most common cause of laboratory-confirmed meningitis in South Africa. 1 Despite the increased coverage of antiretroviral treatment (ART), the country' s incidence of cryptococcal meningitis remains high, and in routine care settings, the disease has a case-fatality ratio of >50% at 12 weeks post-diagnosis. 2-4 Screening and pre-emptive antifungal treatment is desi...