The study of degree attack of H armigera
was performed at VRDS Bacau during 2010-
2012.
The attack appeared at end of June in all
years.
Attack level in first generation of pest was
very low, therefore go unnoticed. There were no
significant differences between the three variants
during 2010 - 2012.
In second generation of H. armigera the
degree of attack (DA%) was under 1,3% in open
field at Unibac and Roma cultivar. In tunnels
DA% was high: 8,9% in 2010, 4,5% in 2011 and
14,5% in 2012. Climatic conditions were very
favorable for pests in 2012: drought and high
temperatures, so that may be a reason why the
attack was very high in tomatoes grown in the
tunnels.
In tunnel the attack in pepper ranged
between 0,9 % in 2010, 3,8 in 2011 and 5,0 % in
2012.
The attack of tomato fruitworm in bean
was high in 2012 in Auria Bacaului variety. The
pest attack of second generation increased
progressively in the three years of study, being:
1,1 in 2010, 2,1 in 2011 and 5,7 in 2012.
The data obtained show that H. armigera
population is increasing. In order to prevent the
damages produced by this pest a continuous
monitoring of its population must be performed.
This pest is polyphagous insect and it can attack
many species of vegetable. |