The effect of biological and chemical control agents on the health status of the very early potato cultivar Rosara

Abstract

The external appearance and quality of table potatoes are determined, among other factors, by the health status of the plants during the growing season. Chemical control methods are often combined with biocontrol agents to effectively fight potato pathogens. Potatoes of the very early cultivar Rosara were grown in experimental plots. The plots were located in Tomaszkowo (NE Poland, 2007-2009). The experiment involved the following treatments: 1) biological control − mycorrhizal Glomus spp. inoculum was applied to the roots, − tubers were dressed and plants were sprayed with Polyversum three times during the growing season, 2) chemical control - at two-week intervals, plants were sprayed with the following fungicides: Infinito 687.5 SC and Tanos 50 WG, Valbon 72 WG and Tanos 50 WG. In the control treatment, potato plants were not protected against pathogens. During the growing season, the severity of late blight and early blight was evaluated on a nine-point scale. The composition of fungal communities colonising potato stems was analysed. The fungistatic properties of the fungicides used in the field experiment were evaluated in an in vitro test. The symptoms of infections caused by Phytophthora infestans and Alternaria spp. were significantly reduced in the treatment which used the integrated chemical and biological control. The least diverse fungal community was isolated from fungicide-treated plants. In the in vitro test, fungicides at all analysed concentrations inhibited the linear mycelial growth of selected pathogens.

Contribution of mycorrhizae to sustainable and ecological agriculture: a review

“…Changes within a population also depend on the interaction of fungi in a given community. The study allowed for the determination of the influence of R. intraradices and C. etunicatum on the development of Colletotrichum coccodes on tomato (Jamiołkowska et al, 2020a) and included the application of AMF which reduced the occurrence of C. coccodes on potato plants (Cwalina-Ambroziak et al, 2015). Therefore, AMF may be recommended to protect tomatoes against root anthracnose.…”

The effectiveness of biological and chemical systems for protecting potatoes from harmful organisms in the central zone of the Krasnodar region

“…In this regard, there is a need for the development of new, improvement of registered pesticides, or the use of biological products. The transition to integrated or biological protection will not only reduce the cost of potato production, overcome the resistance of harmful organisms, but also reduce the toxic load on the environment [5,[12][13][14][15].…”

Yield-protective efficiency of biological and chemical potato protection against Phytophtora infestans (Mont.) de Bary

“…The development of the blight is closely related to the meteorological conditions prevailing during the intensive development of potato plants (Abd-El-Khair andWafaa 2007, Kapsa 2007). Under conditions conducive to the development of P. infestans, even intensive chemical treatments do not protect the plants completely from potential yield losses (Cwalina-Ambroziak et al 2015). Effective protection against the strong infective pressure of the virulent and aggressive P. infestans is provided by an integrated protection method using cultivars highly resistant to the blight (Kapsa 2008, Michalska et al 2011, Aav 2016.…”