Effect of Cyantraniliprole against of Bemisia tabaci and Prevention of Tomato Yellow Leaf Curl Virus (TYLCV)

Cyantraniliprole의 담배가루이에 대한 살충활성과 이를 통한 토마토황화잎말림바이러스 예방

To control Bemisia tabaci on tomato, we applied five different combinations of chemical treatments as below: 1) treatment of combinations of cyantraniliprole on the root area and leaf with the existing registered chemicals three times; 2) treatment of combinations of cyantraniliprole on the root area and dinotefuran + emamectin benzoate on the leaf with the existing registered chemicals three times; 3) treatment of combinations of dinotefuran on the root area and cyantraniliprole on the leaf with the existing registered chemicals three times; 4) treatment of combinations of dinotefuran on the root area and dinotefuran + emamectin benzoate on the leaf with the existing registered chemicals three times; 5) untreated control plot (Table 1). Twenty days after treatment ($17^{th}$ Aug.), the number of population of B. tabaci was zero on the 1, 2, 3, 4 treatments of combinations, and only 2 individuals were found on the 5 treatment of combination per each 20 plant. On $17^{th}$ Sep., in the last observation, the average number of population of B. tabaci was 10.3, 10.3, 10.6 on the 1, 2, 3 treatments of combinations on the 20 plants per each combination, however, the average number of 23.3 and 37.6 were examined on the 4 and 5 treatments of combinations, respectively. TYLCV was not occurring on the 1 and 2 treatments of combinations, and presented only 3% and 17% on the 3 and 4 treatments of combinations, respectively, which indicates that the treatments (1-4) should be effective on TYLCV control as considering that 33% of TYLCV occurred on the untreated control plot. However, after the third flowering period, there is no difference among the five combinations. The amount of products was 9,148g and 9,698g on the 1 and 2 treatments of combinations, respectively, which was the most among the 5 combinations. The number of fallen fruits and the average weight of fruits showed the similar tendency.

토마토에 발생하는 담배가루이 방제를 위하여 토마토 정식 직후 cyantraniliprole 근부관수 fb cyantraniliprole 경엽살포 fb 기존 등록약제 3회 혼용살포(처리 1), cyantraniliprole 근부관수 fb dinotefuran + emamectin benzoate 혼용경엽살포 fb 기존 등록약제 3회 혼용경엽살포(처리 2), dinotefuran 근부관수 fb cyantraniliprole 경엽살포 fb 기존 등록약제 3회 혼용살포(처리 3), dinotefuran 근부관수 fb dinotefuran + emamectin benzoate 혼용경엽살포 fb 기존 등록약제 3회 혼용경엽살포(처리 4) 및 무처리(처리 5) 등 5처리를 시험하였다(Table 1 참조). 정식 20일 후 조사(8월17일)에서는 담배가루이의 밀도는 처리 1, 2, 3에서 각각 20주당 0, 0, 0마리였으며, 처리 4, 5에서는 0, 2마리로 담배가 루이의 유입이 적었다. 9월 17일 마지막 조사에서는 처리 1, 2, 3에서 각각 20주당 10.3, 10.3, 10.6마리였으며, 처리 4, 5에서는 23.3, 37.6마리로 cyantraniliprole 근부관수 및 경엽살포가 비교적 우수하였다. 황화잎말림바이러스병(TYLCV)의 발생도 유사한 경향으로 3화방기까지 처리 1, 2에서는 발병이 없었으며, 처리 3, 4에서는 각각 3, 17%로 무처리의 33%에 비하여 효과가 인정되었다. 그러나 3화방기 이후에는 처리간 차이가 없었다. 상품수량은 처리 1, 2에서 각각 5주당 9,148 g, 9,698 g으로 많았으며, 착과수와 평균과중도 같은 경향이었다.