The arrival of Drosophila suzukii Matsumura in 2009 profoundly changed the pest control of cherry, small fruits and grapevine in North-Italy. The bio-ethological pest characteristics increase the difficulties in containing D. suzukii through traditional methods. Over the years, D. suzukii has gradually increased its population and damage in different areas of North Italy, due to the succession of temperate winters and cool summers. The insect is favored by mild temperatures ranging from 15 to 28°C and humid situations, typical characteristics of forest habitats. Forest is suitable also for the presence of numerous host species, more than 30 species, on which the pest can feed and develop. The management of this pest should be implemented not only looking at the orchard level but also at the agro-ecosystem level, because of the wide range of host plants and of colonized habitats, combined with the high landscape complexity of our areas. It is therefore necessary to implement IPM strategies increasing the effectiveness of insecticide treatments and insect-proof net applications. A proper pruning, grass management, complete harvest of the fruits, and the total removal of the waste production help to maintain unfavorable conditions for the insect development. Insect-proof nets guarantee full effectiveness in containing D. suzukii damage, but economic aspects should be considered. Release programs of native parasitoid Trichopria drosophilae will help to decrease the population density of the pest in both cultivated and wild environments. Results of 2016 showed the good ability in reduction, as much as 40%, of the emergence of D. suzukii from the damaged fruits.
Ecologia e gestione integrata di Drosophila suzukii al Nord
L Tonina;G Santoiemma;
2017
Abstract
The arrival of Drosophila suzukii Matsumura in 2009 profoundly changed the pest control of cherry, small fruits and grapevine in North-Italy. The bio-ethological pest characteristics increase the difficulties in containing D. suzukii through traditional methods. Over the years, D. suzukii has gradually increased its population and damage in different areas of North Italy, due to the succession of temperate winters and cool summers. The insect is favored by mild temperatures ranging from 15 to 28°C and humid situations, typical characteristics of forest habitats. Forest is suitable also for the presence of numerous host species, more than 30 species, on which the pest can feed and develop. The management of this pest should be implemented not only looking at the orchard level but also at the agro-ecosystem level, because of the wide range of host plants and of colonized habitats, combined with the high landscape complexity of our areas. It is therefore necessary to implement IPM strategies increasing the effectiveness of insecticide treatments and insect-proof net applications. A proper pruning, grass management, complete harvest of the fruits, and the total removal of the waste production help to maintain unfavorable conditions for the insect development. Insect-proof nets guarantee full effectiveness in containing D. suzukii damage, but economic aspects should be considered. Release programs of native parasitoid Trichopria drosophilae will help to decrease the population density of the pest in both cultivated and wild environments. Results of 2016 showed the good ability in reduction, as much as 40%, of the emergence of D. suzukii from the damaged fruits.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.