Abstract

Dimethyl disulfide (DMDS), in shank application, was used in two field trialson carrot in Emilia-Romagna and Apulia regions (Italy) against the root-knotnematode Meloidogyne incognita and the cyst nematode Heterodera carotae. The soilwas subdivided in plots 30 or 50 × 4.8 m for shank application with machines. Eachplot was subdivided in 4 or 5 sub-plots to provide replications for each treatment. Inthe trial with M. incognita treatments were: i) DMDS at the rate of 250 L/ha, ii)granular oxamyl (60 kg/ha) followed by the commercial product Micosat F WP NE(6 kg/ha) and iii) granular oxamyl (60 kg/ha) followed by Bioact WG includingPaecilomyces lilacinus (4 kg/ha). In the trial with H. carotae treatments were: i, iiand iii, DMDS at the rates of 370, 280 and 180 L/ha and iv) 1,3 dichloropropene(140 L/ha). In both trials untreated soil was used as control. DMDS was applied3 weeks before sowing in a wet soil (70% of the water holding capacity) with atemperature higher than 20°C. The DMDS and 1,3-D treated plots were thencovered for 2 weeks with a very impermeable plastic film (VIF). After one week ofsoil aeration carrot seeds were sown in each plot. At the end of the crop cycle in theexperiment with M. incognita, DMDS treatment significantly increased marketablecarrot yield (9.7 kg/m2) in comparison to oxamyl followed by either Bioact WG(7.2 kg/m2) or Micosat F WP NE (1.8 kg/m2) and the untreated control (3.9 kg/m2).Also M. incognita soil population density was significantly decreased by DMDStreatment (Pf/Pi=0.2) in comparison to the untreated control (Pf/Pi=14.4) giving thelowest reproduction factor. M. incognita infestation on the roots was assessedaccording to a scale of 6 classes from 0 to 5. In the experiment in Apulia thesignificantly highest marketable carrot yield (5.8 kg/m2) was observed in plotstreated with 400 L/ha of DMDS in comparison to all other treatments and to theuntreated control (0.0 kg/m2). H. carotae soil population density in the untreated control (10.8 eggs and juveniles/g soil) was significantly higher than those observedin the highest DMDS dose (4.5 eggs and juveniles/g soil).

Autore Pugliese

• Sasanelli Nicola

Tutti gli autori

• CURTO G.; DONGIOVANNI C.; SASANELLI N.; SANTORI A.; MYRTA A.

Titolo volume/Rivista

Acta horticulturae

Anno di pubblicazione

2014

ISSN

0567-7572

ISBN

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Numero di citazioni Wos

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Settori ERC

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Codici ASJC

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