PAGs in tobacco production
Phosphopag suppresses growth and propagation of tobacco pests during the vegetation period by as much as 90-96%.
Pathogenic microorganisms can affect tobacco as well as other crops during the vegetation period. Phytopathogens (Peronospora, Alternaria, tobacco mosaic virus, etc.) can attack tobacco both singly and in combination. The gathered tobacco leaf can be damaged by mould fungi.
Environment-friendly biocides, polyalkylene guanidines (PAGs) can ensure a reliable protection of tobacco during all the stages of cultivation and processing.
The All-Russian research institute for tobacco and tobacco products performed field tests of Phosphopag (polyhexamethylene guanidine phosphate) developed and produced by the Institute of Ecotechnologies.
The aim of the studies performed at the Abinsk experimental field was evaluating the activity of Phosphopag against phytopathogens causing diseases of tobacco plants during vegetation.
Tests of Phosphopag were performed during the period of active vegetation of tobacco (variety “Trapezond 219”). The crops planted in May were treated a month later via sprinkling with a Phosphopag solution with dose of 100 g per hectare.
The efficiency of the biocide was evaluated based on the decrease of the amount of lesions of the tobacco plants. The tests have shown that Phosphopag suppresses growth and propagation of tobacco phytopathogens during the vegetation period by as much as 90-96 %.
The ratio of the affected plants was 1.3% in the lots treated with the biocide, and 6-13 % in the non-treated lots (the standard ratio is 1.5-6 %). Phosphopag did not produce any negative impact on the growth and development of the tobacco plants.
Another biocide developed by the Institute of Ecotechnologies, Biopag (polyhexamethylene guanidine) was used for protection of gathered tobacco leaf from mould.
The studies have shown that this biocide with concentration of 1 % has high efficiency against the total complex of phytopathogens and is optimal for use in the production cycle.