Evaluation of sex phermone and chlorantranilliprole (coragen 20% SC)‎r against the tomato leafminer, Tuta absoluta (myrick)‎ on tomato crop

الملخص EN

Population density and percent reduction of Tuta oluta (Myrick) (Lepidoptera: Gelichiidae) males in an open tomato fields (Lycopersicon esculentum, Var.

Bito 186) by using sex phermone {tuta 100 N (3mg/capsule)} and chlorantraniliprole (coragen) were evaluated during growing seasons 2015 and 2016 at Abo-kabir District, Sharkia Governorate Egypt.

Six plots were treated as followes: chlorantraniliprole alone; 2 phermone traps; 2 phermone traps + chlorantraniliprale; 4 phermone traps; 4 phermone traps + chlorantraniliprole in addition to check control plot.

Results showed significant reduction of infestations in all plots during two seasons when plots treated with 4 traps + spraying with chlorantraniliprole than using 2 phermone traps spraying with chlorantraniliprole or plots treated with chlorantraniliprole alone.

The efficiency in reducing larve numbers were 92.26, 90.53, 84.41, 66.50 and 63.97% during season 2015, while values were 93.50, 90.68, 84.75, 70.92 and 64.24% in 2016 season in plots treated with 4 phermone traps + chloranthaniliprole, 2 phermone traps +, 4 phermone traps, and 2 phermone traps, respectively.

When comparing the efficacy of traps numbers, results showed that using 4 traps was better than two traps/ faddan in catching males which recorded 261.00 and 204.40 males/traps/week and 250.30 and 201.10 males/traps/week during 2015 and 2016 seasons, respectively.

For the total yield per faddan, experiments showed that using 4 traps + spraying with chlorantraniliprole was the best treatment than using 2 traps + spraying with during 2015 and 2016 seasons chlorantraniliprole which recorded 39200, 37.70 and 40.00, 33.18 ton/fad.

(treatment or plot), respectively.

On the other hand using 2 traps/ fad.

, recorded the lowest yield.

These results suggest that (chlorantraniliprole) is necessary in control of tomato leafminer in combination with using 4 phermone traps/fad.

, for achieving an effective control of this pest.