Category Archives: Silverleaf whitefly

Collecting to assess Silverleaf Whitefly susceptibility to insecticides

By Melina Miles | Published: March 1, 2012
As the cotton season draws to a close it is time to for the DEEDI team working on Silverleaf whitefly (SLW) resistance monitoring to start making collections of whitefly from across the cotton-growing regions. Even if SLW numbers are below threshold, it is possible for the team to make collections of either nymphs (on leaves) [...]
Also posted in Cotton, insecticide resistance | Leave a comment

Managing Silverleaf Whitefly (SLW) – Wet conditions, late crops and immigrant populations

By admin | Published: March 1, 2012
  Management of whitefly this season will be challenging as a result of the high rainfall and flooding in November and  again in February which has resulted in a wide spread of crop maturity both between and within each region. While some cotton crops will mature on time, others could be set back by as much [...]
Also posted in Cotton | Leave a comment

2010-11 Annual Silverleaf Whitefly Resistance Testing Results and Implications for Management in the coming Season.

By admin | Published: November 14, 2011
Last season was a somewhat low pressure year for silverleaf whitefly (SLW) in all cotton districts. The low pressure may have been attributed in part to high rainfall especially through central Queensland which does not favour whitefly population build up. St George and Mungindi districts still reached densities that exceeded the recommended insecticide spray thresholds [...]
Posted in Silverleaf whitefly | Leave a comment

Season wrap-up for Whitefly in Cotton

By admin | Published: May 13, 2010
 Outlined in today’s blog are the results for whitefly parasitism assessments, whitefly species composition and whitefly resistance testing from the 2009-2010 cotton season. 
Posted in Silverleaf whitefly | Leave a comment

How to check for parasitism in whitefly populations.

By admin | Published: February 22, 2010
We have fielded numerous enquiries this week from consultants who would like to assess levels of whitefly parasitism. This is achievable in the field with the use of a hand lens. Parasitism levels appear to be a little down from last year, but still good levels have been recovered. Parasitism so far has ranged from [...]
Also posted in Natural enemies | Leave a comment

Dealing with chemical shortages for whitefly management – Zara Ludgate

By admin | Published: February 1, 2010
We have received numerous enquiries about whitefly in the last week especially from the MacIntrye and Lower Namoi areas. Shortages of chemicals to control whitefly is currently of major concern to many growers and consultants in this region. Many enquiries also relate to species identification. Whitefly samples identified from the MacIntyre and Lower Namoi areas [...]
Also posted in Admiral, Pegasus | Leave a comment

Silverleaf whitefly update

By admin | Published: February 11, 2009
There are reports of large infestations of silverleaf whitefly (SLW) from the Narrabri/Moree region. Exponential growth in whitefly numbers coupled with honeydew on leaves indicates that the whitefly are probably SLW and not East Australian native Bemisia or Greenhouse whitefly (GHW). It is thought that increased host plant availability from a wet winter/spring, warm conditions [...]
Also posted in Cotton | Leave a comment

Silverleaf whitefly in cotton – an update

By admin | Published: January 23, 2009
Silverleaf whitefly (SLW) is a serious pest of cotton. It reduces yield and quality of cotton due to feeding damage and excretion of honey dew. It is a difficult pest to manage due to its ability to rapidly increase in numbers and the development of resistance to many insecticides. Resistance testing for the 2007-08 season [...]
Also posted in Cotton, whitefly | Leave a comment

Whitefly management options

By admin | Published: February 29, 2008
In the last week, reports from the Downs are suggesting that silverleaf whitefly (SLW) numbers have increased rapidly, and now there are a number of fields that have a population at or exceeding the treatment threshold. This posting has been compiled from information and discussion with Richard Sequeira (Principal Entomologist, Emerald) and Paul Grundy (Senior [...]
Also posted in Cotton | 1 Comment

Whitefly Update

By admin | Published: February 22, 2008
Reports of increasing numbers of whitefly are filtering in from across the Downs. In some cases, numbers are sufficient to suggest that control of Silverleaf Whitefly (SLW) may be warranted. Correct identification and regular monitoring of populations is essential to determine if intervention is necessary. Which whiteflies are out there? Results of whitefly samples identified [...]
Also posted in Cotton | 1 Comment

Bad Behavior has blocked 195 access attempts in the last 7 days.