Resistance inducers and plant growth regulators show only limited and transient effects on infection rates, growth rates and symptom expression of apple trees infected with 'Candidatus Phytoplasma mali'
MetadataShow full item record
The effects of four commercially available bio-active compounds on the infection rates, symptom expression and growth rates of apple trees (Malus x domestica Borkh.) cv. Golden Delicious infected with 'Candidatus Phytoplasma mali' (the so-called Apple Proliferation phytoplasma or AP) were tested over a three-year period under controlled conditions. Post-infection treatments using Bion (R) (active ingredient: Acibenzolar-S-Methyl), Messenger (R) (Harpin protein), Regalis (R) (Prohexadione-Ca) and Dormex (R) (Cyanamide) had no significant effect on infection rates. Terminal growth of apple trees (grown as one-shoot pruned trees) was increased significantly by AP infection; Prohexadione-Ca was the only compound which had a significant (inhibiting) effect on the growth of both infected and non-infected apple trees. Acibenzolar-S-Methyl and Harpin had no significant effects on symptom expression. AP symptoms were masked during summer by Prohexadione-Ca, which caused severe growth abnormalities. Cyanamide changed the seasonal appearance of AP symptoms: while symptoms were delayed compared to the untreated control the first two years (2008 and 2009), symptoms appeared earlier the third year (2010). Differences in symptom expression levelled off later in the vegetative season, and no significant difference was found in October.
Showing items related by title, author, creator and subject.
Matching profit and non-profit needs: how NPOs and cooperatives contribute to growth in time of crisis: A quantitative approach Salustri, A; Viganò, F (Wiley: 18 months, 2015)We propose a microeconomic model aimed at regulating, in a dual production process, the interaction between the formal and the informal sector. The adopted framework is characterized by the absence of information asymmetries. ...
Effects of municipal solid waste compost, farmyard manure and chemical fertilizers on wheat growth, soil composition and soil bacterial characteristics under Tunisian arid climate Cherif, H; Ayari, F; Ouzari, I; Marzorati, M; Brusetti, L; Jedidi, N; Hassen, A; Daffonchio, D (Elsevier, 2009)The use of municipal solid waste compost (MSWC) as soil organic amendment is of an economic and environmental interest. However, little is known about the effectiveness of MSWC application on agricultural soil in northern ...
Wellstein, C; Spada, F (2012)Based on our recent observations in Central Italy we show evidence for root sprouting and subsequent capacity of clonal growth in Fagus sylvatica L. The typology of resprouting in this species is still unclear according ...