Browsing by Author "Anderson, J"

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Masterclasses in soil health and soil biology for the sugar industry : Final report 2016/025
(Sugar Research Australia Limited, 2018) Stirling, G; Evers, A; Young, A; Anderson, J; Garcia-Cuenca, S
A total of 252 sugar growers, productivity services staff and others attended a series of Master Classes in Soil Health/Soil Biology that were held in 2017 and 2018. During those classes they had the opportunity to see some of the microscopic organisms that are found in soil and learn how sugar farming systems could be modified to improve soil biological health. The classes were run by Dr Graham Stirling (Biological Crop Protection), Dr Anthony Young (University of Queensland), Dr Jay Anderson (University of Queensland) and Mr Sebastien Garcia-Cuenca (Sugar Research Australia). However, the highlight of each class was the presentation by one of three growers: Ashley Petersen, Tony Chapman and Simon Mattsson. They explained how they were able to modify their farming system and discussed the soil health and economic benefits they had obtained. Each class concluded with a discussion on how growers could move forward and improve the health of their soils. The process involved identifying the key soil constraints that were limiting productivity; developing an action plan to rectify the problems; modifying the farming system in some way; and then instigating a monitoring program to confirm that benefits had been obtained. Feedback from the participants indicated that the classes were a resounding success. Comments were overwhelmingly positive and compliments such as “excellent course: engaging and interesting”, “the use of microscopes, practical application was great!” and “continue this every year!” were received. Those who attended clearly enjoyed the classes and most indicated that they were willing to accept the challenge of implementing a soil improvement plan.
The bacterial biocontrol agent pasteuria penetrans can help control root-knot nematode on sugarcane
(ASSCT, 2018) Bhuiyan, SA; Stirling, GR; Garlick, K; Anderson, J; Wickramasinghe, P; Wong, E
ROOT-KNOT NEMATODE (Meloidogyne javanica) is one of the most damaging pests of sugarcane, often causing heavy losses in coarse-textured sandy soils. The bacterial parasite Pasteuria penetrans is a potentially useful biocontrol agent and in a 2015–16 survey it was found at relatively high levels in three of the 126 sugarcane fields surveyed. Soil was collected from one of the heavily-infested fields and a pot experiment established to compare root-knot nematode multiplication in naturally infested soil and in soil where the endospores of P. penetrans had been killed by autoclaving. After 37 weeks, the root-knot nematode population was very high in the autoclaved soil but numbers of root-knot nematode eggs and second-stage juveniles were 99% lower in the soil that was naturally-infested with P. penetrans. A subsequent pot experiment with mass-produced endospores showed that when soil contained more than 6 000 endospores/g soil, root galling was not as severe as in non-infested soil and the number of root-knot nematode eggs was reduced by 71–82%. These results indicate that when high endospore concentrations are continually maintained in the root zone, P. penetrans will markedly reduce populations of one of the most important nematode pests of sugarcane.