Rezultatele cercetărilor comparative asupra complexelor de nematode invazive asociate cu insectele dăunătoare la cultura porumb în condițiile Republicii Moldova

Abstract

Maize also known as corn is one of the major field crops, that is plastic from the ecologic aspect, profitable and productive, but every year it is frequently invaded of harmful organisms which have a grave parasitic impact. The results of the phytosanitary control realized each year in the corn plantations remarks a considerable diversity of 6 illnesses caused by 12 species of insect pests, also was realized the estimation of the frequency values, the progressive impact in comparison in phases of vegetation, attacked organs, crop rotation systems, monoculture. It is also associated with invasive nematode complexes, 20 species included in 8 families, belonging to the Tylenchida order, distributed according to the investigated areas, classified into 5 groups of the trophic spectrum. It is estimated that the invasive impact values of the detected endo-ectoparasitic species are frequent and abundant belonging to the families: Pratylenchidae Hoplolaimidae, Heteroderidae, Paratylenchidae, Telotylenchida, Tylenchidae that severely infest the seedlings in the early stages of vegetation.