Published in Scientific Papers. Series A. Agronomy, Vol. LXVI, Issue 2
Written by Paula Lucelia PINTILIE, Elena TROTUȘ, Roxana Georgiana AMARGHIOALEI, Alexandra LEONTE, Andreea ENEA, Andreea Sabina PINTILIE
One of the most polyphagous pests encountered in maize crops is Tanymecus dilaticollis Gyll. which, are consuming the plants foliage in the first phenophases of vegetation and reduce the crop density. Between 2018 and 2021, the series of research carried out in the Center of Moldova concerning the T. dillaticollis Gyll. pest continued and consisted in monitoring the insect attack produced at: (I) maize sown in different sowing timing and (II) different Romanian and foreign maize genotypes. The maize seeds were treated with systemic insecticide from the neonicotinoid class (imidacloprid 600 g/l) according to the disclaimers received year after year from the Ministry of Agriculture in Romania. In the experimented period, the lowest degree of attack was recorded in the late sowing time, at the beginning of May and in mid-May compared to the optimal sowing time, and the most affected by the attack of hibernating adults was the maize sown early. Regarding the attack produced in Romanian and foreign maize genotypes, it was found five of the hybrids experimented registered attack below the average experience. The results show that sowing time and maize genotype have a smaller role as opposed to spring weather conditions which are influencing the attack size and adult density in the maize crop.
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