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<p>Two major pests, brown plant hopper (BPH) and yellow stem borer (YSB) coexist in the late tillering stage of rice. Insecticide combinations are the most effective strategy to manage the pest complex having different feeding behaviours. The toxicity of insecticides (chlorantraniliprole (CAP), triflumezopyrim (TMP), flonicamid (FLO) and pymetrozine (PYM)) in combination and alone were evaluated against BPH and YSB under controlled and field conditions. The lethal doses (LD<sub>50</sub>) were 17.215, 0.059, 0.180 and 0.036 ng per insect for CAP, FLO, PYM and TMP against BPH, respectively. Similarly, LD<sub>50</sub> were 2.737, 0.073, 0.313 and 0.061 ng per larva against YSB, respectively. The combination of 17.215 ng CAP + 0.059 ng FLO per insect resulted in maximum mortality of BPH (86%). The highest mortality of YSB was recorded in the treatment of 2.737 ng CAP + 0.061 ng TMP per larva (86.67%). The insecticide mixtures were physically and chemically compatible, and did not produce phytotoxic effects on rice plant, and were safe to natural enemies (mirid bugs and spiders). Two mixtures of CAP + TMP (15&#xa0;g + 18.75&#xa0;g a.i. ha<sup>− 1</sup> and 22.5&#xa0;g + 12.5&#xa0;g a.i. ha<sup>− 1</sup>) were the most effective in managing BPH and YSB, respectively in field conditions. Notably, both treatments had comparable efficacy against both pests and can be recommended for their management. Pesticide combinations with increased toxicity could reduce the quantities of individual pesticides and the frequency of application, thereby lowering crop production costs.</p>

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Binary insecticide mixtures can improve the efficacy of individual insecticides against Scirpophaga incertulas and Nilaparvata lugens in rice

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Ritesh Mishra,
  • Hara Prasad Misra,
  • Niyati Pandey,
  • Guru-Pirasanna-Pandi Govindharaj,
  • Basana Gowda Gadratagi,
  • Naveenkumar B. Patil,
  • Mahendiran Annamalai,
  • Prakash Chandra Rath,
  • Arabinda Mahanty,
  • Totan Adak

摘要

Two major pests, brown plant hopper (BPH) and yellow stem borer (YSB) coexist in the late tillering stage of rice. Insecticide combinations are the most effective strategy to manage the pest complex having different feeding behaviours. The toxicity of insecticides (chlorantraniliprole (CAP), triflumezopyrim (TMP), flonicamid (FLO) and pymetrozine (PYM)) in combination and alone were evaluated against BPH and YSB under controlled and field conditions. The lethal doses (LD50) were 17.215, 0.059, 0.180 and 0.036 ng per insect for CAP, FLO, PYM and TMP against BPH, respectively. Similarly, LD50 were 2.737, 0.073, 0.313 and 0.061 ng per larva against YSB, respectively. The combination of 17.215 ng CAP + 0.059 ng FLO per insect resulted in maximum mortality of BPH (86%). The highest mortality of YSB was recorded in the treatment of 2.737 ng CAP + 0.061 ng TMP per larva (86.67%). The insecticide mixtures were physically and chemically compatible, and did not produce phytotoxic effects on rice plant, and were safe to natural enemies (mirid bugs and spiders). Two mixtures of CAP + TMP (15 g + 18.75 g a.i. ha− 1 and 22.5 g + 12.5 g a.i. ha− 1) were the most effective in managing BPH and YSB, respectively in field conditions. Notably, both treatments had comparable efficacy against both pests and can be recommended for their management. Pesticide combinations with increased toxicity could reduce the quantities of individual pesticides and the frequency of application, thereby lowering crop production costs.