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Technical annual report 2000-01



Technical annual report 2000-01


Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals

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Dept. of Primary Industry and Fisheries

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Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295



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Department of Primary Industry and Fisheries 14 Table 3. 2001 variety performance Varieties Yield kg/ha* Pac 53IT 12.9 Hycorn 75 13.1 Pac 424 14.2 Pioneer 3335 12.1 Pioneer 3153 14.3 Q 81 9.9 Cracker Jack 11.9 Pioneer 3237 13.3 DK 689 12.9 Site Mean 12.7 *Yield is the average weight from ten hand-harvested plants from each replication converted to t/ha Insect Management Gaucho provided control of leafhopper and protection against Wallaby Ear virus. The control area was infested with leafhopper and severely affected by Wallaby Ear. Affected plants were stunted with dramatically reduced stalk, leaf and root development. The treated area had lower leafhopper numbers and no visible disease symptoms. The use of Gaucho as a seed treatment reduced the need to control leafhoppers and saved two to three insecticide applications. Table 4. Effect of Gaucho on leafhopper number and yield in maize Control Gaucho treated Leaf hopper No./10m row* 94 5 Yield 10.8** 12.7 *Average number from vacuum sample ** Estimated yields from non-replicated hand sample Application of insecticides and biocides through an insectigator proved successful. Improved control was achieved compared to aerial application in previous years. This can probably be attributed to more optimum application times using an insectigator versus waiting for availability of aerial operators. The cost of using an insectigator will be lower than aerial methods over the medium to long term. Gemstar appeared (observation only) to be more effective in reducing larvae numbers than Dipel. However both products require further evaluation under local conditions. The improved insect control is reflected in improved yields in the 2001 season. PROJECT: Industry Development and Extension (Agriculture and Irrigation) Project Officers: F. O'Gara, C. Ham, D. Parker, S Bellgard and M. Connolly Location: Douglas Daly/Katherine Objective: To improve learning and information flow within and between industry and DPIF and increase the performance of irrigated field crop enterprises in the Top End. Background: Irrigated field-crop production is a relatively new and high-input venture in the NT. Most of the producers involved are either new to the NT or new to irrigated production. There is limited expertise in the industry.