In vivo evaluation of fungicides against fruit rot :
Considering the importance of disease and variation in
the recommendations of different fungicides by various
workers for the control of fruit rot disease, a field experiment
was carried out with the fungicides, which were found effective
under laboratory screening to test relative field efficacy of
different fungicides in controlling the Alternaria fruit rot
disease of chilli.
A field trial was conducted at Main Vegetable Research
Station, Anand Agricultural University, Anand during Kharif
2013-14 in Randomized Block Design (RBD) with six treatments
along with four replications. All the recommended agronomical
practices were followed during experimentation. Thirty-five
days old seedlings of chilli cv. GVC-101 were transplanted
with 60×60 cm spacing in the second week of August 2013.
Two foliar sprays of fungicides were given commencing from
the appearance of fruit rot disease and a subsequent spray
was given after 15 days of first spray. The intensity of
Alternaria fruit rot was recorded after seven days of each
spray. Ten plants were selected randomly and labeled from
each plot for scoring the disease intensity. From each plant
three fruits from upper, middle and lower portions were
randomly observed. These selected plants were graded using
0-9 disease rating scale on the basis of percentage area of
fruits infected by the pathogen.
Disease rating scale for scoring the intensity of chilli
fruit rot : 0 = No infection; 1 = 1-10 per cent; 3 = 11-25 per cent;
5 = 26-50 per cent; 7 = 51-75 per cent and 9 = >75 per cent
infection on fruits.
The Per cent Disease Intensity (PDI) was calculated by
adopting the following equation as given by Mayee and Datar
(1986):