Screening of Promising Rootstocks Against Phytophthora Root Rot in Citrus

Y V Ingle; D H Paithankar; Y N Mohod; P N Rakhonde

doi:10.48165/jpds.2023.1801.04

Authors

Y V Ingle AICRP on Fruits, Dr. PDKV, Akola-444104 (Maharashtra), India
D H Paithankar AICRP on Fruits, Dr. PDKV, Akola-444104 (Maharashtra), India
Y N Mohod Plant Pathology Section, Shri Shivaji College of Agriculture, Amravati - 444 603 (Maharashtra), India
P N Rakhonde Plant Pathology Section, Anand Niketan College of Agriculture, Warora - 442 914 (Maharashtra), India

DOI:

https://doi.org/10.48165/jpds.2023.1801.04

Keywords:

Citrus, Root stocks, Screening, Phytophthora, Root rot

Abstract

Citrus root rot caused by Phytophthora parasitica var. nicotianae is the most damaging disease in citrus cultivation in Maharashtra’s Vidarbha region. To overcome the damage caused by this disease, tolerant/resistant rootstocks must be selected. In present study, twelve varied root stocks were tested in sick pot condition to determine tolerance/resistance against Phytophthora nicotianae during 2020-21 by inoculating 6 month old seedlings with a 20 ml spore suspension (108 cfu/ml) of P. nicotianae per pot. Disease incidence, feeder root rot index, percent leaf fall and Phytophthora population density were all assessed six weeks after inoculation. The response of root stocks to the tested pathogen varied. The minimum per cent root rot incidence (4.44 %) and feeder root rot (0.63) was observed in Alemow (C. macrophylla) while maximum root rot incidence (28.89%) and feeder root rot (3.20) was noticed in susceptible check Rough lemon (Citrus jambheri). Rangpur lime Akola had the highest seedling height (28.43 cm), while root stock CRH-12 had the lowest (21.07 cm). The results showed that there were no significant differences in the population density of Phytophthora cfu/cc soil in the tested root stocks. It is thought that the rootstock Alemowisinvolvedin citrusplant tolerantto P. nicotianae.

References

Ahlawat, Y.S., and R. P. Pani, 1999: Major pathogenic diseases of citrus in India and their management. In Srivastava KP and Ahlawat YS (Ed.) Pest management in Citrus. Research Periodicals and Book Publishing House, Texsas, USA, Pp.172-221.

Broadbent, P., L. R. Fraser, and Y. Waterworth, 1971: The reaction of seedlings of Citrus spp. and related genera to Phytophthora citrophthora. Proc. Linnean Soc. N.S.W. (9):219-227.

Carpenter, J. B., R. M. Burnis, and R. F. Sedlacek, 1981: Phytophthora resistant rootstocks for Lisbon lemonsin California. Citrograph, 66:287- 288.

Grimm, G. R., and D. J. Hutchison, 1973: A procedure for evaluating resistance of citrus seedlings to Phytophthora parasitica. Plant Disease Reporter, 57: 669-672.

Kaur Sarbjeet., Anita Arora, H. S. Rattanpal and Anil Kumar 2014: Realative performance of citrus rootstocks to Phytophthora nicotianae var. parasitica causing root rot. Hort Flora Research Spectrum, 3(3): 271-273.

Naqvi, SAMH 2000: Managing Phytophthora disease of citrus. Indian Horticulture, 44: 5-9.

Sawant, S.D., V.V. Sulladhamath, and M. M. Ganapathi, 1993: A method to rank collection/strains of same Citrus species on the basis of susceptibility to Phytophthora. Golden Jubilee Symposium. of Horticulture Societyof India.

Schneider, H., R. C. Platt, W. P. Bitters, and R. M. Burns, 1978: Diseases and incompatibilities that cause decline inlemons. Citrograph, 63:219-221.

Singh, I. P., 1999: Production of disease free planting material-nursery management. In : Citriculture (Ed: Shyam Singh), ICAR, NRC, Nagpur, Pp : 91- 97.

Sonkar, R. K, 1999: Citrus Rotstocks. In: Citriculture (Ed: Shyam Singh), ICAR, NRC, Nagpur, Pp : 54- 65.