18 research outputs found
Influenza del Potyvirus latente del carciofo «Spinoso sardo» sulla produitività delle piante in pieno campo: 2. risultati relativi al secondo anno di impianto
In order to evaluate the influence of the artichoke latent Potyvirus (ALV) on plant productivity, a comparative
field trial between virus-freed by meristem-tip culture and naturally Infected «Spinoso sardo» plants has
been repeated for the second year in Sardinia.
On the whole the results corroborate those of the first year: the latent infection doesn't affect the earliness
and the number of heads per plant; whereas it negatively influences the weight, the diamater and the stem
length of the heads
Ulteriori esperienze di lotta contro il «marciume dei capolini» del carciofo da <i>Botrytis cinerea</i> Pers.
During the winter of 1982 field control trials were carried out against head rot of globe artichoke
(Cynara scolymus L.) induced by Botrytis cinerea Pers. Treatments bega n when first symptoms
appeared and were repeated every 10 days. for 4 times in alI.
Among tested compounds the best results were given by dicarboximide derivatives (vinchlozolin,
procymidox, iprodione, dichlozolinate) and by prochloraz while less satisfactory appeared dichlofluanid
and a mixture of captafol + folpet. No adverse side effect on treated plants was observed
with any fungicide
Reperimento del virus dell'«arricciamento maculato» il del carciofo (AMCV) in Sardegna
A virus disease of «Masedu» of artichoke has been observed, in a serious form, in southern Sardinia
(Italy). Affected plants are stunted with leaves heavily mottled, crinkled and laciniated.
On the basis of the herbaceous hosts reactions, physical properties «in vitro», spectrophotometry,
electron microscopy and serology, the virus recovered from diseased plants is identified
as an isolate of AMCV, belonging to «Tombusvirus» group, serologically undistinguishable from
the italian type isolate
Il Risanamento degli agrumi dal viroide dell'Exocortite mediante il microinnesto
Nearly all old line citrus trees growing in Sardinia (Italy) are infected by citrus exocortis
viroid (CEV).
The technique of shoot-tip grafting has proved effective in recovering various citrus cultivars
free of this viroid
La «maculatura batterica» del pomodoro (<i>Lycopersicum esculentum</i> Mill.) causata da <i>Pseudomonas syringae</i> van Hall.
The Authors report on a serious bacterial spot of greenhouse tomato found in Sardinia (Italy)
on last years.
The symptomatology, epidemlology and inducing factors are described, as well as the results of
pathogenicity test.
The causal agent has been isolated in pure culture and identified by means of morfological,
cultural, biochemical, and serological characters as Pseudomonas syringae van Hall.
Furthermore, methods of dlsease preventlon and control are brlefly exposed
Osservazioni sulla patogenesi e sulla epidemiologia dell'«avvizzimento» del pomodoro (<i>Lycopersicum esculentum</i> mill.) da <i> Alternaria alternata</i> f. sp. <i>Lycopersici</i> grogan, kimble e misaghi
Alternaria alternata f. sp. Lycopersici Grogan, Kimble and Misaghi is the causal agent of a serious wilt of
greenhouse «Earlypak» tomato in Sardinia (Italy).
In phytopathological tests this cv. displayed a very high susceptibility both to direct infection and to metabolites
effect of the fungus; instead some newly introduced tomato hybrids proved, some more some
less, all resistent.
The possible infection sources have been found, and so the ways of disease spreading were examined.
Finally, some measures in order to prevent the disease are suggested
Osservazioni sul «marciume dei capolini» del carciofo (<i>Cynara scolymus</i> L.) da <i>Botrytis cinerea</i> Pers. in Sardegna
The «head rot» of globe artichoke (Cynara scolymus L.) induced by Botrytis cinerea Pers., which occurs
more and more damaging in sardinian crops, 15 described.
The inciting factors (of agronomic, climatic, and biotic nature) are reviewed, and the risks of heavy losses
for the collected and packed artichokes are pointed out.
Suitable means for preventing and controlling the disease are then suggested
L' «Avvizzimento» del pomodoro (<i>Lycopersicum esculentum</i> Mill.) causato da <i>Alternaria alternata</i> f. sp. <i>Lycopersici</i> Grogan, Kimble e Misaghi
A serious disease of tomato cultivar « Early pak 7 » for fresh-market production found in several
greenhouses in southern Sardinia (ltaly) is described. Plants are affected in all stages of
development with local lesions at the foot, and with typical symptoms of a vascular disease. The
causal agent has been identified as Alternaria alternata f. sp. lycopersici Grogan, Kimble and Mis.
Morphological and physiologlcal characters of the fungus grown in pure culture are described,
and also data on pathogeniclty and host-specificity are reported. Laboratory cultural and crossinfection
tests showed that this fungus strongly resembles to A. alternata f. sp.lycopersici
isolated in California (USA) as « tomato stem canker » agent
<i>Fusarium roseum</i> var. <i>avenaceum</i> (Sacc.) Snyd. et Hans. agente di un « marciume molle» dei frutti di pomodoro in coltura protetta
The Authors report on the results of researches about a serious soft
rot of greenhouse tomato fruits recently found in Sardinia (Italy). The disease
symptoms and the characters of its causal agent, identified as Fusarium
roseum var. avenaceum (Sacc.) Snyd. et Hans., are described.
In laboratory, the influence of temperature, pH, and several culture
media on growth and sporulation of the fungus, has been investigated.
Artificial infection tests on tomato showed the high pathogenicity of
the fungus to fruits only, but not to other plant organs
Determinazione dei residui di Deltametrina nelle ciliegie
This paper describes the determination of residues of the insecticide Deltamethrin in cherries growing in the Bonnanaro area near Sassari (Sardinia - Italy). The analytical procedure for the isolation of the insecticide was developed. The quantitative determinations were carried out by HPLC, with UV detector at 220 nm, on a Perkin-Elmer C18-HS3 column with acetonitrile - water (75: 25) as the mobile phase. A rapid decrease of the concentration
of the insecticide with ti me was ascertained; three days
after from the treatment the values were significantly lower than those required by the italian law