Announcements

Job offersmore »

Tweeting Growers

Top 5 - yesterday

Top 5 - last week

Top 5 - last month

Exchange ratesmore »




US (FL): Effects of anaerobic soil disinfestation in tomato

Anaerobic soil disinfestation (ASD) is considered a promising sustainable alternative to chemical soil fumigation (CSF), and has been shown to be effective against soilborne diseases, plant-parasitic nematodes, and weeds in several crop production systems. Nevertheless, limited information is available on the effects of ASD on crop yield and quality. Therefore, a field study was conducted on fresh-market tomato (Solanum lycopersicum L.) in two different locations in Florida (Immokalee and Citra), to evaluate and compare the ASD and CSF performances on weed and nematodes control, and on fruit yield and quality.

In Immokalee, Pic-Clor 60 (1,3-dichloropropene + chloropicrin) was used as the CSF, whereas in Citra, the CSF was Paldin [dimethyl disulfide (DMDS) + chloropicrin]. Anaerobic soil disinfestation treatments were applied using a mix of composted poultry litter (CPL) at the rate of 22 Mg·ha−1, and two rates of molasses [13.9 (ASD1) and 27.7 m3·ha−1 (ASD2)] as a carbon (C) source.

In both locations, soil subjected to ASD reached highly anaerobic conditions, and cumulative soil anaerobiosis was 167% and 116% higher in ASD2 plots than in ASD1 plots, in Immokalee and Citra, respectively. In Immokalee, the CSF provided the most significant weed control, but ASD treatments also suppressed weeds enough to prevent an impact on yield. In Citra, all treatments, including the CSF, provided poor weed control relative to the Immokalee site. In both locations, the application of ASD provided a level of root-knot nematode (Meloidogyne sp.) control equivalent to, or more effective than the CSF.

In Immokalee, ASD2 and ASD1 plots provided 26.7% and 19.7% higher total marketable yield as compared with CSF plots, respectively. However, in Citra, total marketable yield was unaffected by soil treatments. Tomato fruit quality parameters were not influenced by soil treatments, except for fruit firmness in Immokalee, which was significantly higher in fruits from ASD treatments than in those from CSF soil. Fruit mineral content was similar or higher in ASD plots as compared with CSF. In fresh-market tomato, ASD applied using a mixture of CPL and molasses may be a sustainable alternative to CSF for maintaining or even improving marketable yield and fruit quality.

Access the study at HortScience.

Publication date: 7/7/2016

 


 

Other news in this sector:

8/18/2017 Which wavelengths of light are the most effective in photosynthesis?
8/17/2017 How to light your vining crops
8/17/2017 UK: Vertical farming a breeding ground for innovation
8/17/2017 Cravo shares results of Mexcian trials
8/16/2017 Response of hot pepper yield to irrigation water salinity
8/14/2017 Ireland: €24 million available under European Innovation Partnerships Initiative
8/11/2017 These fibre pads claim to store and release ethylene on demand
8/11/2017 Chinese astronauts use the WET Sensor to help grow lettuce in space
8/11/2017 Horticulture NZ responds to freshwater discussion: “Let’s not do this”
8/10/2017 "Taxing water an issue for us all"
8/10/2017 USDA no longer speaks about "Climate Change"
8/10/2017 Combining downward and upward lighting improves plant growth
8/9/2017 Dr. Kubota's video lectures on photoperiod and CO2 now available at Urban Ag News
8/9/2017 LED Grow Book second edition now available
8/9/2017 UK: Survey to understand poor tomato pollination by native bumblebees
8/7/2017 NatureSweet to boost crop yields with new camera technology
8/7/2017 LumiGrow releases LED Growers’ Guide for Vine Crops
7/21/2017 US (FL): $3 million grant helps researchers look for new growing locations
7/21/2017 Photosynthetic responses of leafy veg to irradiance and CO2 concentration
7/21/2017 Production potential generates interest in Dutoli