| dc.description.abstract | The present experiment was conducted at field-1 and field-2 of Hajee Mohammad
Danesh Science and Technology University, Dinajpur, during May to August, 2016 to
find out the incidence of sucking insect pests on okra. The experiment was laid out in a
Randomized Complete Block Design (RCBD). Naturally occurring infestation was
observed in this experiment. The incidence of aphid, jassid, whitefly and red cotton bug
was observed considering per leaf and per plant. The incidence of major sucking insect
pests was increased day by day but some fluctuations were occurred due to variable
weather, environmental condition and physiological properties of soil. In case of field-1,
the peak infestation of aphid, jassid, whitefly and red cotton bug per leaf was occurred on
16.07.2016, 20.07.2016, 12.07.2016 and 04.07.2016, respectively while in case of per
plant the peak infestation was recorded on 16.07.2016, 20.07.2016, 12.07.2016 and
04.07.2016, respectively. In case of field-2 per leaf, the peak infestation of aphid, jassid,
whitefly and red cotton bug was occurred on 20.07.2016, 20.07.2016, 20.07.2016 and
20.07.2016, respectively while in case of per plant, the peak infestation was occurred on
20.07.2016, 30.06.2016, 20.07.2016 and 20.07.2016 respectively. The mean number of
major sucking insect pests per plant was statistically significant (aphid and jassid)
between field-1 and field-2 although field-1 was more vulnerable to the attack of aphid
and red cotton bug than that of field-2. Field-2 was more vulnerable to the attack of
jassid & whitefly than that of field-1. The incidence of sucking insect pests was found in
the following order: Aphid > Whitefly > Jassid > Red cotton bug (field-1) and Jassid >
Aphid > Whitefly > Red cotton bug (field-2). | en_US |
