Corn specimens resistant to Asian corn borer in the Primorsky Territory

Abstract

Sixty-five samples of ecological corn nursery were studied to determine their resistance to the Asian corn borer (Ostrinia furnacalis Guenee) on the natural background of pest infestation for selection for entoimmunity and production purposes. The experiment was conducted in 2019–2021 in the conditions of the Primorsky Territory. Three components of pest resistance of corn samples were studied. As a result of the research, 30 corn hybrids were singled out as less damaged (marked by stalk resistance). Characterization of the most resistant of them (by total damage score) is given. According to the attractiveness of the corn plants for egg-laying female moths, there were 2 hybrids with the lowest pest colonization (10%). Hybrids Newton and P 9300 were noted as less attractive. Twelve corn accessions were characterized by tolerance to pest damage (with insignificant stem and cob stem breakage). Of these, hybrids LK-0.5 and P 9300 were the most tolerant. As a result of research, promising varieties and hybrids of domestic selection NUR, Ladozhsky 301 AMV, Ladozhsky 410 MV, Newton, Baikal were identified. These hybrids of ecological corn nursery are characterized not only by resistance to pest damage, but also to other biotic and abiotic stresses in the conditions of Primorsky Territory. Yields of the selected hybrids varied from 4.2 to 7.4 t/ha, the released variety Slavyanka – on average 5.5 t/ha. The standard corn variety Slavyanka was noted as tolerant. According to the degree of damage, it belongs to the group of medium resistant samples. Resistant corn hybrids made up the group of early-ripening and middle-early specimens.