Mimosa bush (Vachellia farnesiana) is an invasive woody weed widely distributed in Australia. While it can be controlled using several mechanical and chemical techniques, this study evaluated a novel herbicide delivery mechanism that minimizes the risk of spray drift and potential non-target damage. This method, developed by Bioherbicides Australia, involves the implantation of encapsulated granular herbicides into the stem of intact plants or into the stump after cutting off plants close to ground level (cut stumps). Trials were implemented near Moree (New South Wales, Australia) on intact (two experimental runs) plants and cut stumped (two experimental runs) plants. For each trial, an untreated control plus the conventional basal bark application of a liquid formulation of triclopyr + picloram mixed with diesel was included for comparison. Encapsulated glyphosate, aminopyralid + metsulfuron-methyl, hexazinone and clopyralid were also tested in all trials. In addition, encapsulated triclopyr + picloram, and metsulfuron-methyl were included in one of the intact plant trials. Aminopyralid + metsulfuron-methyl was consistently most effective on cut stump and intact plants, whilst clopyralid provided highest mortality when applied to cut stumps and single-stemmed intact plants. Particularly for multi-stemmed intact plants, clopyralid should be applied to each stem. Overall, the highest efficacy was achieved on single stemmed plants, but with further refinement of the technique, it should be possible to achieve similar results for multi-stemmed individuals. This method resulted in a reduction in the use of herbicide and environmental contamination while significantly improving speed of treatment.
Mengembangkan pertanian organik perlu memperhatikan beberapa aspek antara lain kesehatan dan kesuburan tanah, keseimbangan organisme di alam serta dapat memperbaiki kualitas tanaman namun tetap mempertahankan nilai produksi suatu komoditi tanpa menggunakan bahan kimia sintetis. Tujuan dari kegiatan pengabdian ini yaitu meningkatkan pengetahuan, sikap dan tindakan kelompok tani di Kampung Yasa Mulya, Distrik Tanah Miring, Merauke tentang pentingnya mengenal hama, musuh alami tanaman padi serta dapat menggunakan bahan tanaman sebagai bahan insektisida nabati. Metode observasi dilakukan untuk mengumpulkan informasi tentang teknik budidaya padi yang diterapkan dan masalah yang dihadapi petani. Selanjutnya dilakukan sosialisasi kepada kelompok tani tentang hama, penyakit, musuh alami serta pelatihan pembuatan insektisida nabati. Tahap evalusi dilakukan melalui hasil uji coba yang telah dilakukan oleh petani. Berdasarkan hasil observasi dan sosialisasi diketahui bahwa perilaku petani dalam mengaplikasikan pestisida didasarkan pada pemahaman sendiri, pengalaman teman atau saudara serta kekhawatiran akan gagal panen. Persentase biaya yang dikeluarkan petani untuk membeli pestisida sampai dengan 80%. Selain itu, belum pernah dilakukan tindakan pengendalian lain seperti memanfaatkan bahan-bahan alami atau menggunakan entomopatogen.selain menggunakan pestisida sintetik.
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