Bioeconomics of olive psyllid Euphyllura olivina Costa
Bioeconomics of olive psyllid Euphyllura olivina Costa
Wali-ur-Rehman and M. Ismail Chaudhry
ABSTRACT
Euphyllura olivine Costa, a serious pest of Olea
europea, has 8 overlapping generations in a year. Nymphs
and adults of the last generation over-winter during
December - January. Activity returns at the beginning of
February and egg-laying of the 1st generation commence
in 1st half of February which depends upon weather
condition. Subsequently all stages of the pest are met
with from February to November. The peak population of
the pest was observed in April and again in
September/October when the atmospheric maximum normal
temperature and average relative humidity fanged between
300 C to 350 C and 70 to 75 % respectively.
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June 1982
Vol. 32, Iss. 2
