Atypically Behavior of the Maize Leaf Weevil (Tanymecus Dilaticollis Gyll) on Maize and Sunflower Crops, in Climatic Conditions of the Year 2014, in South-East of Romania

Abstract

Climatic conditions of the year 2014 in south-east of the Romania in April and May were atypically. At NARDI Fundulea, rainfalls level, both in April and May were over multiyear average, while air temperature was slight higher then multiyear average in April and lower then multiyear average in May. At ARDS Marculesti, registered rainfall level was slight lower then multiyear average in April and higher then multiyear average in May, while air temperature was higher than multiyear average in April and slight lower then multiyear average in May. Even if the average values of both, the temperatures and rainfalls from spring period of the 2014 seem unfavourable for maize leaf weevil attack at maize and sunflower crops, however this insect produce damaged at both crops. Attack intensity of the maize leaf weevil at the maize untreated plants on a scale from 1 (not attacked) to 9 (total damage) was of 5.91 at NARDI Fundulea and 5.94 at ARDS Marculesti. At sunflower untreated plants, attack intensity of the maize leaf weevil was of 5.45 at NARDI Fundulea and 8.78 at ARDS Marculesti. Untreated sunflower plants were almost totally damaged in 2014, at ARDS Marculesti. In this paper, authors collective try to explain the possible reasons of atypically attacks of the maize leaf weevil at maize and sunflower crops in south-east of the Romania in year 2014.