Announcements

Job offersmore »



Tweeting Growers

Top 5 - yesterday

  • No news has been published yesterday.

Top 5 - last week

Top 5 - last month

Exchange ratesmore »




"Entomopathogenic nematodes effectively kill fungus gnat pests"

Fungus gnats are serious pests in South Africa's undercover farming, often harming production of various crops. The larvae of fungus gnats are soil-dwelling and, if uncontrolled, can chew through a plant's underground root system and severely harm the plant's ability to grow.

In a recently completed MSc study, it was found that local EPNs, which are found naturally in Western Cape soil may be very effective at killing fungus gnats. Therefore, EPNs might prove to be a powerful alternative to chemical insecticides by killing the pest insects without harming humans or the environment.

Biocontrol for fungus gnats has been achieved through the use of biocontrol agents such as EPNs, predatory mites, rove beetles and soil bacterium. Worldwide, control using EPNs has been dominated by the use of the EPN, Steinernema feltiae, which has also been adopted by some South African producers. It is important to note that S. feltiae is an alien EPN species that has, to date, not been isolated from South Africa. Thus the effects of this EPN on South Africa’s biodiversity are still unknown and the importation of this species is illegal. Furthermore, it has been found that S. feltiae is less adaptable to the environmental conditions of high temperatures that prevail in South Africa’s undercover production.

Agil Katumanyane, recently completed an MSc, focused on determining the potential for using local EPNs to control fungus gnats in undercover farms in South Africa. The project was carried out in the Department of Conservation Ecology and Entomology and was supervised by nematologists Prof Antoinette P Malan and Dr Tiarin Ferreira. Funding was provided by NemaBio (Pty) Ltd and the Technology and Human Resources for Industry Programme (THRIP: TP14062571871).

Laboratory bioassays and field trials were performed on the larvae of the fungus gnats. Field trials were performed on a commercial cucumber farm in Paarl, Western Cape. The local EPNs that were tested were found to positively control the fungus gnats both during the laboratory trials and field trials.

Read more at bizcommunity.com

Publication date: 11/20/2017

 


 

Other news in this sector:

4/20/2018 US: New biofungicide approved by California
4/19/2018 Preventive learning about pests before experience takes over
4/19/2018 Australia: Vegetable health gets $16M boost
4/19/2018 Rick Antle - A legend in agriculture passes away
4/19/2018 Insect screen - Alternative to chemical control in open field production of carrot and cabbage
4/13/2018 Australia: Also sterile fruit flies enlisted in fruit fly fight
4/11/2018 Spain left on its own in EU plant protection discussions
4/10/2018 Veg IPM Update: Allium leaf miner
4/10/2018 US (CA): Isagro announces EPA registration for Taegro 2 biofungicide
4/5/2018 Solution to prevent blotchy ripening in tomatoes
4/4/2018 Kemin Crop Technologies and Plant Products announce new relationship
4/3/2018 NL: "Growers feel restricted in crop protection"
3/30/2018 UK: Bee survival computer model adopted by industry
3/29/2018 New frontier to protect peppers against European corn borer
3/29/2018 Russia: Infected Egyptian strawberries destroyed in Nizhniy Novgorod
3/29/2018 CropLife America emphasizes pesticide safety data transparency
3/29/2018 North America: New fungicide for powdery mildew control
3/28/2018 Fighting spider mite in cannabis cultivation
3/28/2018 US (MA): Botrytis and edible crops
3/28/2018 AmericanHort welcomes Farm Bill pest and disease funding