ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of temperature, wetness period and fungal inoculum concentration on incidence of post-harvest tomato fruit rots.

Silveira, N. S. S., Michereff, S. J., Mariano, R. L. R., Tavares, L. A. and Maia, L. C.

Fitopatologia Brasileira. Volume 26, Number 1, 2001. Pages 33-38.

2001

บทคัดย่อ

The influence of temperature (5, 15, 25 and 35 deg C), wetness period (0, 3, 6, 12, 24, 48 and 72 h) and inoculum concentration (101, 102, 104, 106 and 108 spores/ml) on the intensity of postharvest rots in tomato (Lycopersicon esculentum cv. Santa Clara) fruits caused by Fusarium verticillioides, Geotrichum candidum and Rhizopus stolonifer was studied. Temperature significantly (P=0.05) influenced rot incidence. A higher incidence of lesions was observed when fruits were incubated at 25 deg C. Disease development was not observed in fruits inoculated with F. verticillioides and incubated at 5 and 35 deg C. The smallest incidence of G. candidum and R. stolonifer rots was observed at 35 deg C. The incidence of R. stolonifer rot was very high at 5, 15 and 25 deg C, varying between 97.5 and 100%. The presence of free water on the surface of tomato fruit was not necessary for the incidence of F. verticillioides, G. candidum and R. stolonifer rots. However, disease incidence levels increased with the increment in the wetness period, except for R. stolonifer, which caused 100% disease incidence even in the absence of free water. The incidence of tomato fruit rots increased with the increment of the inoculum concentration from 101 to 108 spores/ml. It reached 100% at 104 spores/ml for F. verticillioides and R. stolonifer, and 108 spores/ml for G. candidum.