Population fluctuations of fruit flies, Bactrocera spp. in
submountainous mango and guava orchards.
Horticultural Research Station, Jachh (Nurpur) - 176 201, India
fruit fly (Bactrocera dorsalis and B. zonata ) population was monitored
with the help of bottle traps containing 100 ml aqueous solution of 0.1%
methyl eugenol and 0.25% malathion per trap, in mango and guava
orchards of submountainous region of Himachal Pradesh, India. The
maximum catch of 98.6 and 62.6 males/trap for mixed population was
recorded during 30th and 27th standard weeks in 1992 and 1993,
respectively, in mango orchard. The corresponding catch in guava orchard
was 427.2 and 517.0 during the 37th and 39th standard weeks. There was
a significant positive correlation between the trap catch and maximum
and minimum temperatures during both the years for both the hosts. The
maximum catch coincided with the ripening period of fruits.