ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Spread of Phytophthora rot on stored citrus and its prevention by fungicide dips.

Chitzanidis, A.; Argyri, I.;

Bulletin OEPP Year: 1990 Vol: 20 Issue: 1 Pages: 163-168 Ref: 6 ref.

1990

บทคัดย่อ

Oranges and lemons infected by P. citrophthora and P. syringae were placed among healthy fruits in boxes kept at 5, 10 and 14 deg C. The spread of the rot by contact infection was assessed after 3, 6, 12 and 18 d and again after 7 d shelf-life at 17 deg . P. citrophthora infected adjacent fruits after 12 d at 10 deg and 3 d at 14 deg . No infection occurred at 5 deg . P. syringae infected the fruits at all the temp. tested. On fruits kept for 6 d at 5 deg , the rot developed after shelf-life. The presence of Phytophthora-infected fruits in orange and lemon packing boxes enhanced the development of Penicillium rots. Postharvest dips in metalaxyl at 0.05 and 0.1% concn and fosetyl-Al at 0.1, 0.2 and 0.3% concn prevented the spread of P. citrophthora in packing boxes kept for 30, 40 and 60 d at 11 deg , but had no effect on Penicillium rots. The mixture of the above fungicides with thiabendazole at 0.1% or imazalil at 0.05% concn gave the best control of both rots. This paper was presented at the MPU/EPPO Conference on Phytophthora diseases of citrus and other crops in the Mediterranean area held in Palermo, Italy on 18-22 Apr. 1989.