Azoxystrobin is one among the
strobilurin class of systemic fungicides.
Its effect results in mycelial collapse,
sporulation inhibition or disruption of
some vital stages of fungal development
(5). The present study showed 100 %
inhibition of mycelial growth of C.
gloeosporioides by azoxystrobin. This
inhibitory activity of azoxystrobin has
been reported in several studies; for
example Hsiang et al. (7) found that,
azoxystrobin (1.0–100 µg a.i./ml)
eliminated urediospore germination of
Puccinia hemerocallidis. Mycelial growth
and sporulation of Alternaria alternata
(18), Botryosphaeria parva and
Phomopsis sp. (4) were also inhibited by
azoxystrobin. This fungicide inhibited the
conidia to germinate and form appressoria
of Guiganardia bidwellii (6). Reuveni
(17) reported that azoxystrobin effectively
controlled downy mildew (Plasmopara
viticola) and powdery mildew (Uncinula
necator) of grapevines. It controlled also
black sigatako leaf spot (Mycosphaerella
fijiensis) of banana (14), smolder (Botrytis
narcissicola) of narcissus (13), and
leather rot (Phytophthora cactorum) of
strawberry (16). Moreover, all the doses
of azoxystrobin had not caused any
phytotoxic effect to the mango trees. This
phytotoxic observation was very much
important because azoxystrobin causes
blossom abnormality and chronic toxicity on
apple trees (9).