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Catalogue: GRDC Media
While the recent cold weather has impacted aphid numbers and activity, the pressure earlier in the season means that there is a level of primary infection in some crops which could escalate rapidly if aphid numbers build significantly in spring... According to NSW Department of Primary Industries plant pathologist Joop van Leur, testing to identify the virus species present in faba bean is still in progress early indications are that the main virus present is Bean yellow mosaic virus (BYMV) with smaller incidences of Bean leafroll virus (BLRV) and other luteoviruses... Consultants and growers are being urged to monitor aphid populations closely in the lead up to spring and implement control strategies early to avoid severe virus infection later in the season...
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Catalogue: GRDC Media
A near-perfect start with good summer and autumn rain coupled with mild temperatures saw crops jump out of the ground... Insect pests including green peach aphid (GPA) and the resulting beet western yellows virus (BWYV or synonym, turnip yellows virus) and diamondback moth (DBM) both proved headaches for growers at different stages of the growing season... Mr Baker says the colonisation of DBM in canola crops this year looks to be at a lower level for much the same reason as the risk of GPA and BWYV is this year - a much drier summer and early autumn than last year and less of a green bridge on which to survive...
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Catalogue: GRDC Media
A near-perfect start with good summer and autumn rain coupled with mild temperatures saw crops jump out of the ground... Insect pests including green peach aphid (GPA) and the resulting beet western yellows virus (BWYV or synonym, turnip yellows virus) and diamondback moth (DBM) both proved headaches for growers at different stages of the growing season... Mr Baker says the colonisation of DBM in canola crops this year looks to be at a lower level for much the same reason as the risk of GPA and BWYV is this year - a much drier summer and early autumn than last year and less of a green bridge on which to survive...
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