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Capnodis tenebrionis (L. 1758) (Coleoptera: Buprestidae): Morphology and Behaviour of the Neonate Larvae, and Soil Humidity Effects on the Egg Eclosion
No full textCapnodis tenebrionis (L. 1758) is reported for several countries of the Mediterranean
subregion as a common phytophagous insect of many cultivated and wild species of trees and shrubs
belonging to the family Rosaceae. Infestations on stone-fruit orchards have economic effects and can
often cause the death of the plants in consequence of larval tunnelling into the roots. Egg laying occurs
in late spring and summer on the trunk base or nearby in the soil. The importance of the neonate larval
skills in relation to the biological success of this pest has stimulated its morphological, ecological and
ethological studies to better understand the hatching mechanisms and the mortality effects of humidity
on the eggs.
In the present contribution, the morphology of the fi rst larval instar is described throughout and
illustrated, and the morphological details are compared with those of the mature larva.
A survey on the hatching mode points out that neonate larvae, wherever eggs are laid, always come
into contact with the soil.
Finally, hatching rates were determined under laboratory conditions at four soil moisture levels,
expressed as percentage of the Field Water Holding Capacity. A comparison was made with respect to
a control of dry soil. The results prove that soil humidity signifi cantly affects the egg eclosion, especially
at the higher values
Note morfologiche ed etologiche sulla larva neonata di Capnodis tenebrionis (L.) (Coleoptera: Buprestidae)
No full textThe peach flatheaded rootborer, Capnodis tenebrionis (L.), and its enemies
No full textCapnodis tenebrionis (L.) (Coleoptera Buprestidae) is an important and common
phytophagous insect of Mediterranean stone-fruit orchards. Current knowledge on its enemies is really
scanty and no biological control strategy has been possible to set up. The survey conducted in South
Italy areas pointed out the extreme scarcity of Capnodis natural enemies. Only a bethylid species,
Sclerodermus cereicollis Kieffer, and some entomopathogenic fungi were found. The susceptibility of
the peachborer adults to 2 commercial formulations of Bacillus thuringiensis (Berliner) was assessed
in laboratory bioassays. Both products proved to be totally inefficacious in controlling the beetles
Nemici naturali di Capnodis tenebrionis (L.) (Coleoptera: Buprestidae) ed effetto dell’umidità del suolo sulla schiusura delle uova
No full textBiological notes on larval hatching in Capnodis tenebrionis (L.) (Coleoptera: Buprestidae) and evaluating entomopathogenic nematodes against neonate larvae
No full textCapnodis tenebrionis (L.) (Coleoptera Buprestidae) is an important and common insect pest of Rosaceae
trees in several countries of the Mediterranean Basin. Infesrations on stone-fruit trees are often so severe as to totally
destroy the orchards in consequence of larva! feeding on the roots. Egg laying occurs in summer on the trunk base
or nearby in the soi!. A survey on the eclosion mode pointed out that neonate larvae, wherever eggs are laid, a!ways
come into contact with the soi! environrnent, so justifying emomopathogenic nematode (EPN) application. The
susceptibility of newly hatched larvae to EPN species was assessed in 2 laboratory bioassays by using multi-well
tissue culture plates and cherry plum potted plants, respectively. Indigenous Southern Italian strains of Steinernema
carpocapsae (Weiser) (ItS-MR7) and Heterorhabditis bacteriophora Poinar (ItH-CE1) were tested. Both species
proved to be very effective in controlling C. tenebrionis larvae
Efficacia e persistenza in campo di spinosad nella lotta agli adulti di Capnodis tenebrionis (L.) (Coleoptera Buprestidae)
No full textBiological notes on larval hatching in Capnodis tenebrionis (L.) (Coleoptera Buprestidae) and evaluation of entomopathogenic nematodes in controlling neonate larvae
No full textProve preliminari di efficacia in campo di spinosad per il controllo degli adulti di Capnodis tenebrionis (L.)(Coleoptera Buprestidae)
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