Development of an improved spray timing system for process peach in Hawke's Bay

Self Cite

A technology transfer project jointly funded by industry and government commenced in 1995 to implement integrated fruit production methods in the canning peach and fresh summer-fruit industry in Hawke's Bay. A suite of decision aids was used to assist growers in weather-based fungicide spraying aimed to minimise fungicide inputs while achieving consistent disease suppression. The main diseases were brown rot and peach rust. Most of the 13 participating growers achieved good results despite unusually wet summers in both 1995/96 and 1996/97. Their crops received minimal fungicide inputs that were well timed and most had low disease levels at first pick. However, some crops had unacceptable levels of disease. The reasons for this and ways to prevent disease reoccurrence are discussed.

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transfer of disease management technology to the canning peach industry in Hawke's Bay

Tate¹,

Wood²,

Hodson³

et al. 1997

Self Cite

“…Preinfection and postinfection applications were made within 48 hours of an infection period whenever possible. Infection periods were determined using guidelines developed by Tate et al (1995). Applications were carried out over the period from bloom to January.…”

Section: Timing Of Sulphur Applications In Relation To the Weathermentioning

confidence: 99%

“…Interpretation of the effect of timing of the sulphur treatments is complicated by the exceptionally wet season which made it difficult to separate post and preinfection timings. Studies by Tate et al 1995 indicate that preinfection spraying is more effective than postinfection or standard programmes. This one-year trial suggests that sulphur could be effective when applied after an infection period, but this is difficult to explain in view of the protectant-only activity of sulphur.…”

Section: Fruit Cropsmentioning

confidence: 99%

An evaluation of sulphur for brown rot control in Central Otago stonefruit

McLaren¹,

Fraser²,

Lynch³

1996

Monilinia fructicola (Wint.) Honey was controlled in the blossom blight and fruit brown rot stages in season-long programmes on nectarines, peaches and apricots using sulphur. The efficacy of three rates of sulphur (80, 120 and 160 g ai/100 litres) was tested on two apricot cultivars, 'Sundrop' and 'CluthaGold'. Sulphur, applied from flowering to harvest, delayed ripening in apricots but caused no apparent damage to the leaves or fruit. Sulphur was also effective in trials to compare the timing of applications in relation to infection periods. Preinfection, postinfection and standard programmes were all effective, but a wet season complicated interpretation of infection period timing.

“…Information on this IPM programme has also been given to summerfruit growers at field days and in newsletters. Control of diseases is based on pre-infection spraying aided by infection period forecasts (Tate and Manktelow 1992;Tate et al 1995). This information is provided by a commercial advisory service in conjunction with this TBG project.…”

Section: Introductionmentioning

confidence: 99%

Implementation of integrated pest management in Hawke's Bay

Lo¹,

Wood²,

Murrell³

1997

Self Cite

A project jointly funded by industry and government commenced in 1995 to implement integrated pest management in the summerfruit industry in Hawke's Bay. Twelve process Golden Queen peach growers and one fresh market summerfruit grower were trained to conduct pest monitoring and make appropriate spray decisions. Monitoring programmes and spray thresholds have been developed for leafrollers, oriental fruit moth and green peach aphid. Unacceptable insect damage to fruit at harvest averaged 0.8% and 0.4% during the past two years on monitored orchards. This satisfactory result was achieved with a 73% reduction in post-blossom insecticide applications in 1996/97 compared with 1993/ 94. These averaged 1.1 sprays on monitored Golden Queen blocks compared with 1.8 applications on other Golden Queen orchards in 1996/ 97.