Damage to winter triticale grain by herbivorous bugs in the Leningrad region
Keywords:
winter triticale, herbivorous bugs, grain damage, nitrogen fertilizers, infrared microscopyAbstract
Damage to grains by some species of herbivorous bugs can lead to a significant decrease in the quantitative and qualitative parameters of the formed crop. Given the species composition and abundance of bugs in the North-West region, such a problem does not exist, at the same time, there are no actual data on the damage to grains of cultivated grain crops. Based on the results of the analysis of samples performed using infrared microscopy, low damage to winter triticale grain by herbivorous bugs was determined in 2022-2024 in the fields of the Menkovsky branch of the Agrophysical Research Institute in the Leningrad Region. The share of damaged grains in the total mass of the harvested crop varied from 1.2 to 4 % over the years. In the vast majority of cases, the grains had a slight degree of damage. The damage caused by the species Aelia acuminata, Carpocoris purpureipennis and Dolycoris baccarum was predominant. Spring fertilization with nitrogen fertilizers led to an extension of the ripening period of winter triticale and an increase in grain damage by herbivorous bugs. The highest proportion of damaged grains corresponded to the experimental variants with high doses of nitrogen fertilizers and amounted to 1.3 to 5 % in different years.
