A laboratory experiment was conducted to examine the efficacy of summer oil (kz
oil 95%) at concentrations 0.5 and 1% and sulfur dusting on oviposition of Tuta absoluta,
where each plant consumed about 15 ml of spraying liquid and about 0.75 gr of
sulphur.
One month -old tomato plants in pots were used; each pot contained two plants considered
one replicate of treatment and repeated three times. Control plants were treated with water
only. Plants were placed randomizely in three cages each contained four pots, a replicate of
all treatments. A choice test was carried out , where four pairs of adult insects (male and
female) were released in each cage .The number of eggs laid by females was recorded in
3, 6 and 10 days after insects released. Results showed that all tested compounds had a
repellent effect on oviposition of Tuta absoluta which continued 6 days after insects
release, where the summer oil at concentration 0.5and 1% caused a decrease in eggs
number 59.45 and%76.95 respectively، and sulfur caused a decrease 56.23% compared
with the control. The effect of tested compounds decreased in ten days.
