УДК 633.111.1:631.811.1:632.7.04/08
INJURIOUSNESS OF Rhopolosiphum padi L. FOR WHEAT IN CONNECTION WITH SUPPLY OF NITROGEN
S.N. Petrova1, K.V. Tsebitts2, N.V. Parakhin1
In the conditions of greenhouse on wheat of the Sobi variety, growing at different doses of nitrogen fertilizers, the authors analyzed the population parameters and the functional activity in bird cherry aphid with the use of electronic registration of penetration of aphid lancet to plant (EPG-diagnostics). It was shown, that attractivity change depends on nitrogen doses directly. The most disturbances in photosynthetic apparatus of plants during invasion were observed in the N-75, N-100 and N-125 variants, the optimal conditions for aphid nutrition — in the N-75 variant (plants supply of nitrogen of 75 %), when the aphid lancet is in phloem over a long period of time. For objective assessment of injuriousness the EPG-diagnostics must supplement with estimation of dynamics of an abundance of aphid population.
Keywords: nitric fertilizers, Rhopolosiphum padi, wheat, electrical penetration graph (EPG), Yield PS II.
1ФГОУ ВПО Орловский государственный |
Поступила в редакцию |
