Crop loss assessment of tomato leaf miner Tuta absoluta (Lepidoptera: Gelechiidae) in Hamedan province

عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران

Tomato leaf miner moth, Tuta absoluta Meyrick (Lep.: Gelechiidea) is one of the devastating pest of solanaceous crop plants causes considerable quantitative and qualitative damage to tomato product imports each year. The crop loss and economic injury level (EIL) of the pest was determined under field conditions in a randomized completed block design with five treatments including control (without T. absoluta egg infestation), 1, 2, 4 and 8 eggs per plant and in the second year control (without T.absoluta egg infestation), 2, 4, 8 and 16 eggs per plant. Each treatment replicated four times placed within ventilated wooden cages during 2014-2015. In order to measure crop loss of the tomato leaf miner moth under field conditions, the length and width of fruits, fruit weight, damaged and the total leaf area, amount of chlorophyll and carotenoids, the number of damaged and healthy fruits, number of galleries and intact and damaged fruit percentage were measured and recorded. The regression analysis between number of galleries and other parameters were surveyed. Linear regression equation between the number of galleries and infected fruit number were estimated as Y= 0.002 X + 4.801, (R2:0.59) and Y=0.003 X + 2.867, (R2:0.53) respectively in 2014 and 2015. Regression line equation between the number of galleries and percentage of infected fruit were estimated as Y= 0.002 X + 12.113, (R2:0.5) and Y=0.002 X + 13.158, (R2:0.51) respectively in 2014 and 2015. Collectively, these results may be useful to develop a management strategy to control the tomato leaf miner moth.

tomato leaf miner؛ EIL؛ crop loss assessment؛ decision making levels