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  • Author or Editor: Madhavi Devanaboina x
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Screening Potential Citrus Rootstocks for Phytophthora nicotianae Tolerance

Seeds from four citrus rootstocks including sour orange, Bitters-C22 citrandarin, Sarawak pummelo × Rio Red grapefruit, and Sarawak pummelo ×   Bower mandarin were exposed to high inoculum levels of Phytophthora nicotianae to screen for tolerance. Inoculation of pregerminated seeds (PGIS) and non-PGIS was carried out. The average P. nicotianae propagule counts from the soil samples where these seedlings were raised ranged from 424 to 1361 colony forming units/cm3. The proportion of live to dead plants was recorded at 11 months postinoculation, which showed that Sarawak ×   Bower performed significantly better than other rootstocks. Evaluation of the rootstocks 18 months postinoculation resulted in only one surviving sour orange plant, which suggests potential rootstock resistance.

Open Access
Type:
Journal Article
in HortScience
Published print:
01 Jul 2020
Volume/Issue:
Volume 55: Issue 7
Article Category:
Research Article