436
anacardii).
.
The number of major cashew pests was scouted every week and scores
of inflicted injuries on shoots, inflorescence and nuts were recorded in each of the
experimental units as recommended (Martin et al. 1997; NARI 2010).
5.4 Effectiveness of Oecophylla longinoda in Controlling
Cashew Pests
The efficacy of tested methods in controlling cashew pests was established based on
the data for insect records and injury scores. The number of cashew pests in each
treatment was compared using pairwise multiple comparisons (Steel-Dwass
method), whereby each of the tested pest control methods was compared with the
rest of the methods. The nut yield collected from each tree was weighted in kilograms (kg) to obtain average yield from each treatment.
5.5 Economic Analyses of Using Oecophylla longinoda
The pest management costs (variable costs) incurred in each of the treatments
were itemized. The harvested cashew nuts were categorized into grades, first, second and third, to help relate the market price with the obtained yield from each
treatment. Apart from cashew grades, the market price considered the mode of
crop management, whereby organically produced cashew nuts fetched higher
market prices compared to inorganically produced ones. In order to perform dominance analysis, insect pest management practices (treatments) were arranged in
order of increasing variable costs (William 2015). A treatment was dominated if
its variable costs were higher than the proceeding treatments but its net benefit
was lower. Such a treatment was termed as dominated treatment and was denoted
by letter “D”.
6 Study Findings
Among the research undertakings were the development of protocol on how to
collect and introduce colonies in new orchards (Rwegasira et al. 2015), guidelines
on identification of queen nest and subsequent collection for re-establishment in
new fields (Nene et al. 2017) and techniques to massively rear O. longinoda
queens (Rwegasira et al. 2017). Also undertaken was a detailed examination of the
efficacy of the predator in controlling the cashew pests and the comparative efficacy with the commonly used insecticides (Abdulla et al. 2016) and economic
analyses of the comparative use of O. longinoda and synthetic insecticides
(William 2015).
G. M. Rwegasira et al.
anacardii).
.
The number of major cashew pests was scouted every week and scores
of inflicted injuries on shoots, inflorescence and nuts were recorded in each of the
experimental units as recommended (Martin et al. 1997; NARI 2010).
5.4 Effectiveness of Oecophylla longinoda in Controlling
Cashew Pests
The efficacy of tested methods in controlling cashew pests was established based on
the data for insect records and injury scores. The number of cashew pests in each
treatment was compared using pairwise multiple comparisons (Steel-Dwass
method), whereby each of the tested pest control methods was compared with the
rest of the methods. The nut yield collected from each tree was weighted in kilograms (kg) to obtain average yield from each treatment.
5.5 Economic Analyses of Using Oecophylla longinoda
The pest management costs (variable costs) incurred in each of the treatments
were itemized. The harvested cashew nuts were categorized into grades, first, second and third, to help relate the market price with the obtained yield from each
treatment. Apart from cashew grades, the market price considered the mode of
crop management, whereby organically produced cashew nuts fetched higher
market prices compared to inorganically produced ones. In order to perform dominance analysis, insect pest management practices (treatments) were arranged in
order of increasing variable costs (William 2015). A treatment was dominated if
its variable costs were higher than the proceeding treatments but its net benefit
was lower. Such a treatment was termed as dominated treatment and was denoted
by letter “D”.
6 Study Findings
Among the research undertakings were the development of protocol on how to
collect and introduce colonies in new orchards (Rwegasira et al. 2015), guidelines
on identification of queen nest and subsequent collection for re-establishment in
new fields (Nene et al. 2017) and techniques to massively rear O. longinoda
queens (Rwegasira et al. 2017). Also undertaken was a detailed examination of the
efficacy of the predator in controlling the cashew pests and the comparative efficacy with the commonly used insecticides (Abdulla et al. 2016) and economic
analyses of the comparative use of O. longinoda and synthetic insecticides
(William 2015).
G. M. Rwegasira et al.