is of the utmost significance to study the interaction between herbicides. This may be accomplished by selecting the optimal combination, which, through synergy, delivers more cost-effective weed control than a single herbicide. Under laboratory conditions, interactions between binary mixtures of bensulfuron, propanil, 2,4-D, or bentazon on chlorophyll reduction of Lemna minor were investigated using the Additive Dose Model. Mixtures of propanil/2,4-D resulted in low antagonism whereas strong antagonism was evident in bensulfuron-methyl/propanil. Combinations of bensulfuron/bentazon and bensulfuron/2,4-D led to moderate antagonism. By contrast, propanil in combination with bentazon demonstrated a modest degree of synergism. The findings of this study could provide good guideline and insights when mixing two herbicides for weed control in rice fields and other aquatic environment.

 

Keywords: Antagonism; joint-action; synergism; tank mixture

 

Abstrak

Kajian mengenai tindakan bersama racun herba adalah amat penting untuk mengurangkan kegunaan racun herba, mengurangkan masalah alam sekitar dan melambatkan evolusi kerintangan racun herba. Ini boleh dicapai dengan memilih campuran optimum melalui tindakan sinergistik yang memberikan kawalan rumpai yang lebih berkesan kos daripada racun herba tunggal. Penyelidikan ini dijalankan untuk menilai interaksi antara campuran binari bensulfuron, propanil, 2,4-D, atau bentazon terhadap pengurangan klorofil pada Lemna minor dengan menggunakan Model Dos Tambahan dalam keadaan makmal. Campuran bensulfuron/propanil, bensulfuron/bentazon, bensulfuron/2,4-D dan propanil/2,4-D menyebabkan antagonisme yang rendah hingga kuat. Namun, sinergisme yang sederhana diperoleh pada campuran propanil dan bentazon. Hasil kajian ini dapat memberi panduan dan kefahaman apabila menggabungkan dua racun herba untuk kawalan rumpai di sawah padi dan persekitaran akuatik yang lain.

 

Kata kunci: Antagonisme; sinergisme; tangki campuran; tindakan bersama

 

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*Pengarang untuk surat-menyurat; email: chuahts@uitm.edu.my

 

 

 

 

 

 

 

 

   

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