Sugarcane is an essential industrial that produce sugar in the world. Scirpophaga excerptalis attacks can reduce the productivity of sugarcane up to 34%. To enhance the resistance to multiple stresses, Silicon is one of the elements for its role. This research aimed to determine the effect of the provision of silica fertilizer as part of the Integrated Pest Management strategy. This research was conducted in the Plant Protection Department, Indonesian Sugar Research Institute. The compost given as treatment in this research was straw, cane, and corn composts. Organic silica fertilizer (compost) provides the same effect as inorganic silica fertilizer in increasing the induction of sugarcane resistance to sugarcane top borer (S. excerptalis). Rice straw compost was a compost fertilizer that provides the best sugarcane resistance to sugarcane top borer compared to sugarcane plants that treated with sugarcane and corn leave to compost.
We conducted monthly monitoring of lepidopterous moth borers in four sugarcane fields in Java, Indonesia, from May 2009 to May 2011. Fields sampled belonged to Pesantren Baru, Jombang Baru, Gondang Baru and Subang sugar factories. Three main moth borer species were found to inflict damage to sugarcane plantations in all regions, and these are the stalk borers Chilo sacchariphagus (Bojer) and Chilo auricilius Dudgeon and the top borer Scirpophaga excerptalis (Walker). Tetramoera (Eucosma) schistaceana (Snellen) was also encountered but only caused minor damage. Borer populations increased with plant age and reached a peak around January – May in most cases, with the onset of rainfall triggering population rise. All borers coexisted in the same plant with no evidence of competition between the two stalk borers (C. sacchariphagus and C. auricilius) over their specific feeding location (internode) or between the two stalk borers and the top borer (S. excerptalis) over the same plant. This suggests that an infestation by one species does not make the plant less desirable to be colonised by another. Parasitism rates by natural enemies were very low which reflects the challenges facing biological control efforts in Java. Knowledge generated through this project will improve our understanding of borer dynamics in South East Asia and will enhance our preparedness for potential introduction by any of these pests into Australia
Produktivitas tebu dapat menurun karena serangan hama dan keberadaan gulma di kebun. Pengendalian penggunaan pestisida masih menjadi pilihan ketika serangan hama dan populasi gulma tidak dapat dikendalikan secara manual. Aplikasi pestisida pada tanaman tebu tidak menutup kemungkinan bersamaan dengan parasitoid Trichogramma sebagai agen pengendali hayati hama penggerek tebu. Oleh karena itu tujuan dari penelitian ini adalah untuk mengetahui pengaruh aplikasi pestisida berbahan aktif klorantraniliprol serta paraquat diklorida dan diuron terhadap proporsi penetasan parasitoid, proporsi malformasi, dan lama hidup parasitoid Trichogramma japonicum. Percobaan Menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 ulangan. Perlakuan yang diuji adalah kontrol (tanpa perlakuan), infestasi pias T. japonicum pada daun tebu yang terbuka insektisida/herbisida hari ke-0, ke-1, ke-2, dan ke-3. Hasil pengamatan menunjukkan bahwa aplikasi insektisida berbahan aktif klorantraniliprol tidak berpengaruh nyata terhadap persentase penetasan dan kematian parasitoid tetapi berpengaruh nyata pada persentase malformasi serangga. Adapun aplikasi herbisida berbahan aktif paraquat diklorida dan diuron berpengaruh nyata terhadap proporsi penetasan, malformasi serangga dan kematian parasitoid T. japonicum .Kata kunci : insektisida, herbisida, klorantraniliprol, paraquat diklorida, diuron, Trichogramma ABSTRACTSugarcane productivity decreases due to the presence of weeds and pest incursion in the field. Pesticide is still an option in controlling pest and weed populations when they cannot be controlled manually. Sometimes pesticide application coincides with the release of parasitoid Trichogramma, a biological control agent of sugarcane borer pests. Therefore, the purpose of this study was to determine the effect of the pesticide application with active ingredients chlorantraniliprole, paraquat dichloride and diuron on the percentage of parasitoid hatching, malformations, and the life span of the parasitoid Trichogramma japonicum.The experiment used a completely randomized design (CRD) with 5 treatments and 4 replications. The treatments tested were control (untreated), T. japonicum infestation on sugarcane leaves exposed to insecticides/herbicides on the 0, 1, 2, and 3 days. The results showed that the application of insecticides with the active ingredient chlorantraniliprole had no significant effect on hatching and parasitoid deaths percentage, but it was a significant different in the percentage of insect malformations. Meanwhile the application of herbicides with the active ingredients of paraquat dichloride and diuron had a significant effect on hatching, malformation and parasitoid deaths percentage of T. japonicum.Key word : insekticide, herbicide, clorantraniliprol, paraquat diclorida, diuron, Trichogramma
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