NECREMNUS ARTYNES (WALKER) PARASSITOIDE DI TUTA ABSOLUTA (MEYRICK) SU POMODORO, MELANZANA E SOLANUM NIGRUM L. IN SERRA A CONDUZIONE BIOLOGICA

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Abstract

[automatically translated] In 2010, in the greenhouses of Palermo managed according to organic farming canons, he conducted a study aimed at identifying natural enemies native moth Tuta absoluta gelechide, exotic pest harmful to the Solanaceae recently introduced in Italy. The sampled plants were tomatoes, from January to June, eggplant, from late March to June, and Solanum nigrum growing spontaneously in greenhouses in small clearances from cultivated Solanaceae. To control the gelechide, the serricoltore made three treatments with Bacillus thuringiensis from mid-March to late April. In addition to the predator Nesidiocoris tenuis, Shield Bug miride already known in the Mediterranean as an active antagonist of T. absoluta, They were found a few specimens of a parasitoid braconide not yet identified and eulofidi Diglyphus crassinervis and Chrysocharis Pentheus, while the parasitoid largely dominant (90% of all parasitoids) was the eulofide Necremnus artynes. This parasitoid has represented on average 34% of sfarfallati insects (parasitoids T. absoluta +), with significant differences in the three Solanaceae; In fact, the eggplant has reached 81% of sfarfallati, on tomato 35%, while on S. nigrum only 3%. No artynes despite its Palearctic origin, had never been found so abundant as on T. absoluta; In fact the two guests known to date, both lepidopteran cosmopterigidi, had been found sporadically. This suggests that his guests favorite natives, probably gelechidi, are yet to be identified. The significant biological control exercised by indigenous predators and parasitoids recorded in the sampled greenhouses, and the good production and economic results achieved also by organic crops investigated, making it less urgent the need to introduce specific exotic natural enemies of T. absoluta.
Original languageItalian
Pages356-356
Number of pages1
Publication statusPublished - 2011

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