Corn smut harmfulness by plants infection at different ontogenesis stages | Вредоносность пузырчатой головни кукурузы при заражении растений в разные стадии онтогенеза
2010
Buga, S.F. | Zherdetskaya, T.N., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute of Plant Protection
In the conditions of the Republic of Belarus under artificial infectious background conditions there was studied maize (Zea mays) smut harmfulness by an example of hybrids Bemo 172 SV and Nemo 216 SV. The crop losses are determined by seeds and hypocotyls infection. For the first time the method of seed inoculation by fungus Ustilago zeae teliospores with the help of needle injection into corn stem and ear is described. The described method provided killing of 20,2% seedlings in soil, 94,4% of undergerminated seeds in Petri dishes, 10,5% of plants at the stage 13 (the third leaf unfolded). Grain harvest deficiency from plants differently infected by the disease is calculated. The correlation dependence between grain weight from plants and their infection by the disease from 1 to 6 points is determined. The photos of corn smut symptoms expression in the form of smut nodes on seed hypocotyls are presented and for the first time on panicle.
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