Strong yields from anthracnose-tolerant lupin

06 Jan, 2001 03:01 PM

ONE of Agriculture WA's more recent variety releases, Tanjil lupin, is performing above expectations, according to many growers who harvested lupins this season. The variety was developed by Agriculture WA and the seed is currently marketed by SGB Australia. It combines excellent yields with the best available anthracnose resistance. Anthracnose has been prevalent in WA since 1996 and has the capacity to infect crops, significantly reducing their yield potential. Tanjil has been welcomed particularly by growers in the state's north where the risk of the disease is highest. Tanjil's resistance to aphids and Cucumber Mosaic Virus (CMV) strengthens its attributes. Watheroo grower Richard Crombie has been growing Tanjil on his property, Arrawarra, since 1998. So impressed has he been with Tanjil during the past three seasons that his lupin program is now entirely sown to this variety. Mr Crombie was one of the first growers to have the opportunity to bulk up Tanjil on behalf of SGB Australia. In 1998 he planted Gungurru, Tallerack and, for the first time, Tanjil in his program. A total of 36 hectares of basic Tanjil seed was sown at 69.5kg/ha in late April, yielding 2.43 tonnes per hectare. He was impressed with Tanjil at an early stage because it resisted aphid infestation, had no signs of root disease, was competitive with weeds throughout the year and remained erect right through to harvest. It ended up outyielded both Gungurru and Tallerack by 0.8t/ha. In 1999 he sowed Tanjil and Gungurru and dropped Tallerack from the lupin program. In all, 155 hectares of Tanjil were sown at 95kg/ha in late April, yielding 2.6t/ha. Tanjil again outyielded Gungurru by 20pc and was found to have less cracked seed as more bulk was passing through header and was easier to thresh. Although not measured, the anthracnose resistance to Tanjil was obviously starting to pay off compared with Gungurru. This season, Mr Crombie is only growing Tanjil on Arrawarra, with Gungurru dropped from lupin program. One 65ha Tanjil paddock on which a recent seed test was held was sown at 95kg/ha in mid-May and has yielded 1.9t/ha, which is pretty good considering the season. A representative sample was taken off the header and the results have just been received, testing negative for both anthracnose and CMV. A recommendation to all lupin growers is to test seed intended to be sown to produce next season's crop so as to limit both anthracnose and CMV carryover. Agwest Plant Laboratories manager Mark Holland suggests that growers should not be complacent in their management of anthracnose or CMV. "There have been minimal visual anthracnose and CMV effects on crops this season due to the dry conditions, but these diseases are still out there," he said. "We will be monitoring all lupin seed samples received from the harvest to try and predict likely disease pressures for the coming season. It is important to note that growing resistant varieties like Tanjil will minimise risk of yield losses in future seasons. "Those growers in lower risk areas should also seriously consider growing resistant varieties as part of their lupin program. "Lupins recently harvested and intended for next season's sowing seed should be tested to gauge suitability. The results received can be compared with the maximum seed infection thresholds. This information is included in the results." ÿ


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