Palms (Phoenix canariensis) infested by red palm weevil (Rhynchophorus ferrugineus Olivier): insecticidal efficacy tests of chipping treatment
Sperandio, G.; Fedrizzi, M.; Guerrieri, M.; Fanigliulo, R.; Pochi, D.; Tomasone, R.; Pagano, M.; Arnone, S.; Cristofaro, M.; Sasso, R.; Musmeci, S.
Journal of Agricultural Engineering, Proceedings of the 10th Conference of the Italian Society of Agricultural Engineering
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Department of Agricultural Economics and Engineering
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|Abstract in English:|
The provision n° A6505/29-11-2010 of the Lazio Region Agricultural
Department states that the plant material resulting from the felling
of palms infested by RPW (Rhynchophorus ferrugineus Olivier) must
be disinfested by heat treatment or fine mechanical chipping, ensur-
ing that the resulting materials obtained are of a size smaller than 2
cm. This paper describes changes made on one machine chipper
FARMI mod. FOREST CH260 for use in the cutting of trees and
palm leaves in accordance with the above mentioned provision. The
analyzes carried out on the plant material shredded, according to
methodology UNI CEN/TS 15149-1 - 2006, show that 94,78% of the
fragments is smaller than 16 mm and a water content of 52.5%. In all
fragments of the material shredded at least one of the three dimen-
sions was less than 2 cm. A mix of chipped stipes and leaves of
palm tree was tested at ENEA facilities to evaluate the ability of
RPW larvae to feed and survive on this substrate. Ten plastic con-
tainers (130 liters) were filled up with 26 kg each of chipped mat-
ter and infested with larvae grouped by weight into 3 classes ranged
from < 0.15 g, 0.15 -;- 0.35 g and > 0.35 g till 2 cm (3 containers for
each class and 1 as control; 30 larvae for each container).
Containers, covered with a metallic net, were kept in an isolated
chamber, controlling temperature in order to maintain the substrate
around 30°C. The substrate was inspected at 45 dd after infestation.
No survival was recorded on the larvae, indicating that chipping
technique could be a suitable method to destroy infested palm
avoiding potential risks of re-infestation from the disposal sites.