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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 170 Table 1. Total weight, number and average weight of fruit from different avocado cultivars Date Cultivar Weight (kg) Number Average fruit weight (g) 28/2/01 Kimberley * 1.14 6 190 28/2/01 Peterson 0.66 1 660 28/2/01 Semil 34 0.7 4 175 28/2/01 T6 0.96 6 160 28/2/01 Victoria* 2.32 3 773 28/2/01 Zutano seedling 15.08 117 129 28/2/01 Zutano seedling 5.56 27 206 * Average of 2 trees; all others are from single trees. PROJECT: Stone Fruit Evaluation in the Alice Springs Region Project Officers: D. King, N. Isgro, I. Broad, A. Nesbitt and G. Kenna Location: Arid Zone Research Institute and Ti Tree Research Farm Objective: To enhance the profitability and productivity of stone fruit in the Alice Springs region. Introduction: Although at present there are no commercial plantings of stone fruit in the Alice Springs region, there are indicators that potential markets for Central Australian stone fruit may exist in the Northern Territory. Stone fruit trees have been grown in the past at AZRI for research purposes. Initially these trees grew well and produced satisfactory crops, however they eventually became unthrifty and had a short life span. The rootstock used for these earlier plantings was Nemaguard. This rootstock was not able to adapt to the high pH levels of the soils, or the high soil temperatures experienced through the summer period. Method: New plantings were established at AZRI in 1996, 1997 and 1998 consisting of peaches, nectarines, apricots and plums. Presently there are six varieties of apricots, five of plums, 10 of peaches, and 17 of nectarines. Four new varieties of apricots were planted in 1999. A planting was also established at the Ti Tree Research Farm in 1998. It includes eight varieties of peaches, five of nectarines and two of apricots. These will produce fruit in 2001. The aim of these plantings is to evaluate the potential for commercial production of dessert stone fruit in Central Australia, using a range of rootstocks and to assess the suitability of varieties with varying chill requirements. The main rootstock used on a number of low chill selections of peaches and nectarines is Brights Hybrid, (a peach/almond hybrid). This rootstock has nematode resistance and a tolerance to high soil temperatures and pH levels. Plum and apricot varieties are grown on plum rootstock Microbalan 29C and Marianna. Results: In 1997 low chill peaches and nectarines, in their second year, produced their first crop. Flowering began at the end of August and harvest commenced in mid November. Fruit counts, weights and diameters were recorded. In 1998 the same trees carried their second crop and were assessed as for 1997, including brix measurements. In 1999, during the third crop there was an overall increase of 18.16 kg of fruit per tree. In 2000, the Unknown variety produced 265 kg, Sunraycer 193 kg, and Sundowner 190 kg - a distinct increase over previous years.