Sains Malaysiana 48(3)(2019): 581–588

http://dx.doi.org/10.17576/jsm-2019-4803-10

 

Different Imazethapyr Placements and Rainfall Amounts Affect Phytotoxic Activity of Imazethapyr in Combination with Oil Palm Frond Residue Mulches against Common Weeds in Landscapes

(Penempatan Imazetapir dan Kuantiti Hujan Mempengaruhi Aktiviti Kefitotoksikan Gabungan Imazetapir dengan Sungkupan Pelepah Kelapa Sawit terhadap Kawalan Rumpai dalam Landskap)

 

MUHAMMAD AMIRUL NORDIN¹, DILIPKUMAR MASILAMANY² & CHUAH TSE SENG^3*

 

¹School of Food Science and Technology, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu Darul Iman, Malaysia

 

²Inbred Rice Program, Rice Research Center Malaysian Agricultural Research and Development Institute, (MARDI) 13200 Seberang Perai, Kepala Batas, Pulau Pinang, Malaysia

 

³Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA, 02600 Arau, Perlis, Malaysia

 

Diserahkan: 3 Mei 2018/Diterima: 15 Disember 2018

 

ABSTRACT

A combination of oil palm frond (OPF) mulch and imazathapyr has been shown to provide great inhibition of weed but its phytotoxicity may be influenced by imazethapyr placement on the OPF mulch and rainfall amount. This study aimed to evaluate effects of herbicide placement and rainfall amount on the phytotoxic activity of imazethapyr in combination with OPF mulches against goosegrass, slender cyperus and coat buttons under glasshouse conditions. Imazethapyr was applied at 10.4 g a.i. ha^-1 to under or above or as a pretreatment on the OPF mulch residue powder (< 2 mm) at 3.5 t ha^-1. Imazethapyr placement did not influence its inhibitory effects against weed emergence. Both pretreated mulches and imazethapyr applied under the mulches had comparable inhibition of seedling growth for goosegrass and slender cyperus. However, the pretreated mulches gave better seedling growth inhibition of both bioassay species as compared to those of imazethapyr that applied above mulches. Coat button was highly inhibited regardless of any imazethapyr placements. An increase in rainfall amount from 150 to 450 mm could increase the seedling emergence of goosegrass and slender cyperus from 30 to 80% when subjected to pretreated mulches. However, different rainfall amounts had no significant effect on coat buttons seedling emergence. The pretreated mulches could reduce weed seedling growth by 75 to 80% without being affected by the rainfall amounts. The present results suggested that phytotoxic activity of imazethapyr in combination with OPF residue mulches is dependent on imazethapyr placement, rainfall amount and weed species.

 

Keywords: Herbicide placement; imazethapyr; oil palm frond mulch; rainfall amount

 

ABSTRAK

Kombinasi antara sungkupan pelepah kelapa sawit (PKS) dan imazetapir telah menunjukkan perencatan rumpai yang baik tetapi kefitotoksikannya mungkin dipengaruhi oleh penempatan imazetapir pada PKS dan kuantiti hujan. Kajian ini bertujuan untuk menilai kesan penempatan racun rumpai dan kuantiti hujan terhadap aktivit kefitotoksikan kombinasi imazetapir dengan sungkupan PKS terhadap rumput sambau, rumput wangi dan kancing baju di bawah keadaan rumah kaca. Imazetapir pada 10.4 g a.i. ha^-1 ditempatkan sama ada di bawah atau di atas atau sebagai pra-rawatan pada serbuk sungkupan PKS (< 2 mm) pada 3.5 t ha^-1. Penempatan imazetapir tidak mempengaruhi keberkesanannya terhadap perencatan kemunculan rumpai. Pra-rawatan sungkupan dan imazetapir yang disembur di bawah sungkupan mempunyai perencatan yang setanding terhadap pertumbuhan anak benih rumput sambau dan rumput wangi. Walau bagaimanapun, pra-rawatan sungkupan memberi perencatan yang lebik baik terhadap pertumbuhan kedua-dua spesies bioasai berbanding dengan yang disembur di atas sungkupan. Kancing baju mempunyai perencatan yang tinggi tanpa mengira sebarang penempatan imazetapir. Peningkatan kuantiti hujan daripada 150 hingga 450 mm dapat meningkatkan kemunculan anak benih rumput sambau dan rumput wangi daripada 30 hingga 80% apabila diperlakukan dengan pra-rawatan sungkupan. Walau bagaimanapun, kuantiti hujan yang berbeza tidak memberi kesan yang bererti pada kemunculan anak benih kancing baju. Pra-rawatan sungkupan dapat mengurangkan pertumbuhan benih rumpai sebanyak 75 hingga 80% tanpa dipengaruhi oleh kuantiti hujan. Keputusan kajian ini mencadangkan bahawa aktiviti kefitotoksikan imazetapir yang dicampur bersama sungkupan PKS adalah bergantung kepada penempatan imazetapir, kuantiti hujan dan spesies rumpai.

 

Kata kunci: Imazetapir; kuantiti hujan; penempatan racun rumpai; sungkupan pelepah kelapa sawit

RUJUKAN

Aichele, T.M. & Penner, D. 2005. Adsorption, desorption, and degradation of imidazolinones in Soil 1. Weed Technology 19: 154-159.

Ainie, K., Ai, T.W., Kamaruddin, N. & Beng, Y.C. 2007. Pesticide application in the oil palm plantation. Oil Palm Bulletin 54: 52-67.

Anderson, A.L. 2006. The influence of tillage and landscape on imazethapyr persistence and sorption in soil. MSc dissertation. Manitoba: University of Manitoba (Unpublished).

Broschat, T.K. 2007. Effects of mulch type and fertilizer placement on weed growth and soil pH and nutrient content. HortTechnology 17: 174-177.

Case, L.T. & Mathers, H. 2006. Herbicide treated mulches for weed control in ornamentals. Journal of Environmental Horticulture 24: 84-90.

Chalker-Scott, L. 2007. Impact of mulches on landscape plants and the environment-A review. Journal of Environmental Horticulture 25: 239-249.

Chen, Y., Strahan, R.E. & Bracy, R.P. 2013. Effects of mulching and preemergence herbicide placement on yellow nutsedge control and ornamental plant quality in landscape beds. HortTechnology 23(5): 651-658.

Chuah, T.S. & Lim, W.K. 2015. Assessment of phytotoxic potential of oil palm leaflet, rachis and frond extracts and powders on goosegrass (Eleusine indica (L.) Geertn.) germination, emergence and seedling growth. Malaysian Applied Biology 44(2): 75-84.

Curran, W.S., Loux, M.M., Liebl, R.A. & Simmons, F.W. 1992. Photolysis of imidazolinone herbicides in aqueous solution and on soil. Weed Science 40: 143-148.

Dilipkumar, M., Mazira, C.M. & Chuah, T.S. 2017. The potential use of oil palm frond mulch treated with imazethapyr for weed control in Malaysian coconut plantation. Sains Malaysiana 46(8): 1171-1181.

Faiz, M.A.A. 1999. Effects of herbicides on seed germination and control of Pennisetum polystachion (l.) schult. Journal of Rubber Research 2(2): 120-130.

Gillespie, W.E., Czapar, G.F. & Hager, A.G. 2011. Pesticide fate in the environment: A guide for field inspectors. Contract Report. p. 10.

Jursík, M., Kočárek, M., Hamouzová, K., Soukup, J. & Venclová, V. 2013. Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower. Plant Soil Environment 59(4): 175-182.

Khalid, H., Zin, Z.Z. & Anderson, J.M. 1999. Effect of oil palm residues management at replanting on soil nutrient dynamics and oil palm growth. Proceeding of the PORIM International Palm Oil Congress. Kuala Lumpur, Malaysia: Malaysian Palm Oil Board. pp. 235-246.

Lanphear, F.O. 1968. Incorporation of Dichlobenil in mulches. Weeds 16: 230-231.

Marble, S.C. 2015. Herbicide and mulch interactions: A review of the literature and implications for the landscape maintenance industry. Weed Technology 29: 341-349.

Martini, G., Pedrinho Junior, A.F.F. & Durigan, J.C. 2003. Eficácia do herbicida glifosato-potássico submetido à chuva simulada após a aplicação. Bragantia 62(1): 39-45.

Mathers, H. 2003. Novel methods of weed control in containers. HortTechnology 13: 28-31.

Monquero, P.A. & Silva, A.C. 2007. Efeito do período de chuva no controle de Euphorbia heterophylla e Ipomoea purpurea pelos herbicidas glyphosate e sulfosate. Planta Daninha 25(2): 399-404.

Samtani, J.B., Kling, G.J., Mathers, H. & Case, L. 2007. Rice hulls, leaf-waste pellets, and pine bark as herbicide carriers for container-grown woody ornamentals. HortTechnology 17: 289-295.

Smith, H.C., Ferrell, J.A., Webster, T.M., Fernandez, J.V., Dittmar, P.J., Munoz, P.R. & MacDonald, G.E. 2016. Impact of irrigation volume on PRE herbicide activity. Weed Technology 30(3): 793-800.

Somireddy, U.R. 2012. Effect of herbicide-organic mulch combinations on weed control and herbicide persistence. PhD dissertation. United States: Ohio State University (Unpublished).

Sondhia, S. 2013. Evaluation of imazethapyr leaching in soil under natural rainfall conditions. Indian Journal of Weed Science 45(1): 58-61.

Thomas, A.F. 1973. Herbicide-impregnated mulches for weed control in container nursery stock. Scientia Horticulturae 1(2): 165-170.

Thomson, W.T. 1993. Agricultural chemicals. Book II Herbicides. Fresno, CA: Thomson Publications.

Vencill, W.K. 2002. Herbicide Handbook. 8th ed. Champaign: Weed Science Society of America. p. 154.

 

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