Abstract
Survey of guava (Psidium guajava L.) orchards was conducted to assess the incidence and severity of fruit anthracnose of
guava in Sheikhupura, Sargodha, Faisalabad, Hafizabad, Jhang and Chiniot districts of Punjab province. Maximum disease
incidence was recorded in Shiekhupura (24%) followed by Sargodha (18.37%) while minimum in Chiniot (9%). Disease
severity in Sheikhupura, Sargodha, Faisalabad, Hafizabad, Jhang and Chiniot districts was recorded as 55%, 42%, 35%, 46%,
31% and 22% respectively. Efficacy of different chemicals (mancozeb, daconil, ridomil gold, derosal, bayleton, aliette),
biological agents (Aspergillus flavus, A. niger, A. fumigatus, Trichoderma harzianum) and Plant growth promoting
rhizobacteria (PGPR) (Bacillus subtilis and Pseudomonas fluorescens) was tested in vitro against Colletotrichum
gloeosporioides, the causal agent of anthraconose of Guava. Aliette was the most effective at all concentrations followed by
mancozeb which was effective at 20 and 40 ppm concentrations but less at 60 ppm. Derosal was least effective at its all
concentrations. Aspergillus flavus and Pseudomonas florescence were found to be the most effective treatments among fungi
and PGPR evaluated respectively in inhibiting the colony growth of C. gloeosporioides. These findings may provide
information regarding chemical and biological control against C. gloeosporioides under in vitro conditions and serve as guide
for future field trials.
