The effect of herbicide applications on the content of ascorbic acid and glycoalkaloids in potato tubers

Abstract

Field experiments were conducted at Zawady Experimental Station (University of Podlasie) in 1999-2001 to test the effect of herbicides (Sencor 70 WG, Basagran 600 SL) and their mixtures (Sencor 70 WG with Fusilade Super, Basagran 600 SL with Focus Ultra) on the content of ascorbic acid and glycoalkaloids in tubers of three potato cultivars. The application of herbicides to potato fields caused an increase in the content of ascorbic acid in comparison with the control. The statistical analysis showed a significant effect of potato cultivars on ascorbic acid and glycoalkaloid concentrations.

Glycoalkaloid contents in potato leaves and tubers as influenced by insecticide application

“…It was confirmed by an interaction of cultivars and insecticides. Many papers (Percival and Dixon 1996, Mazurczyk and Lis 2000, Zarzecka and Gugała 2003, Trawczyński and Wierzbicka 2011, Wierzbicka 2011) proved a significant effect of potato cultivar on this characteristic. Also, weather conditions in the study years significantly changed concentrations of glycoalkaloids (Table 5).…”

“…The tubers of Polish potato cultivars contain between 12 and 159 mg/kg glycoalkaloids, German cultivars have values ranging between 20 and 220 mg/kg, American -20 to 130 mg/kg and British -36 to 142 mg/kg (Dale andMackay 2007, Nowacki 2009). The total glycoalkaloid level in tubers is mainly influenced by genetic factors (Percival and Dixon 1996, Mazurczyk and Lis 2000, Trawczyński and Wierzbicka 2011, weather conditions of a given season (Hamouz et al 2005, Zarzecka and Gugała 2007, Trawczyński and Wierzbicka 2011 and agrotechnological factors (Pęksa et al 2002, Zarzecka and Gugała 2003, Żołnowski 2010, Wierzbicka 2011.…”

Pre- Emergence Herbicides and Mulches Affect Weed Flora and Marketable Yield of Chili Crop

“…Mulches also improve the microclimate of the plant and provide suitable condition for vegetative growth (Olasantan, 1985) by decreasing competition by weeds for moisture and nutrients (Zarzecka and Gugala, 2003;Amador-Ramirez et al, 2005). Thus, mulching treatments also resulted in higher number of leaves per plant as compared to weedy control (Franquera, 2011).…”

“…The number of fruit per plant depends on favorable soil and climatic conditions. Since, the pre-emergence herbicides are decreased the weeds density of all the weeds of chili crop (Table 1 and 2), it may have help in greater moisture and nutrients availability to the crop (Pandey, (2000;Zarzecka and Gugala, 2003), that increased the number of fruit per plant. The mulching treatments also resulted in more fruit per plant, however, the highest number of fruits were with black polythene mulch.…”

“…The loss in yield is because of weeds competition which reduces the height and ultimately reduces the production (Coleman and Gill, 2005). The application of herbicides minimize the infestation by weeds and increase the marketable yield (Zarzecka and Gugala, 2003;Khokhar et al, 2006). By contrast, both pre and post emergent herbicides minimize weeds density and promote yield.…”