Environ.Entomol.13: 1010-1014 (1984) ABSTRACT Field experiments were carried out to determine if a copper-based fungicide known to deter feeding by the Colorado potato beetle, Leptinotarsa decemlineata (Say), in the laboratory, could suppress the growth of L. decemlineata populations in the field when used regularly for plant disease protection on tomatoes, potatoes, and eggplants. Larval densi...

The objective of the work was to assess the effect of mild alkaline pretreatment on the anaerobic biodegradability of tomato processing waste (TPW). Experiments were carried out in duplicate BMP bottles using a pretreatment contact time of 4 and 24 h and a 1% and 5% NaOH dosage. The cumulative methane production during a 30 d period was recorded and modelled. The alkaline pretreatment did not s...

effect of calcium chloride on tomato quality and shelf life of petoearly ch, koral and rio grand tomato cultivars were studied at the agricultural and natural resources research center of west azerbaijan, iran over 2002-2003. a calcium chloride solution in 0,0.5% and 1% concentrations was sprayed on the tomatoes three times. the fruit was harvested at the mature green stage and stored in cold s...

any planning for the future requires estimates of future conditions. it is possible to study changes over time series. in this study, changes of production and cultivated area of 17 field crops of khorasan razavi province in a 25-year period were determined with mann - kendall test, sen’s estimator slope and linear regression. analysis of the three tests showed that performance of 76.5% from yi...

Five trials were carried out to assess the potential productivity of tomatoes in a deep culture hydroponic system in Genting Highlands (1,200 m a.s.l.), Malaysia. The tomatoes were maintained as single-stemmed plants using the layering and vertical methods ofplant training. Determinate and indeterminate varieties producing large, medium and small-sized fruits were investigated in these trials. ...

The effects of commercial vermicomposts, produced from food waste, on infestations and damage by aphids, mealy bugs and cabbage white caterpillars were studied in the greenhouse. Vermicomposts were used at substitution rates into a soil-less plant growth medium, MetroMix 360 (MM360), at rates of 100% MM360 and 0% vermicompost, 80% MM360 and 20% vermicompost, and 60% MM360 and 40% vermicompost t...

Tomatoes have been implicated in salmonellosis outbreaks due to possible contamination through bacterial internalization during postharvest handling. This study was conducted to determine the effects of tomato variety, temperature differential between tomato pulp and bacterial suspension, and the time delay between stem removal and immersion in bacterial suspension on internalization of Salmone...

The purpose of this study was to investigate the effectiveness of ultraviolet-C (UV-C) light inactivation as affected by the location of pathogens on the surface and at stem scars of whole grape tomatoes. A mixed bacterial cocktail containing a three strain mixture of Escherichia coli O157:H7 (C9490, E02128 and F00475) and a three serotype mixture of Salmonella enterica (S. Montevideo G4639, S....

0260-8774/$ see front matter Published by Elsevier doi:10.1016/j.jfoodeng.2011.07.021 ⇑ Corresponding author. Address: USDA/ARS/EMFSL Baltimore Ave., Beltsville, MD 20705-2350, USA. Tel.: + 301 504 9466. E-mail address: [email protected] (K. Chao) Lycopene is a major carotenoid in tomatoes and detecting changes in its content can be used to monitor the ripening of tomatoes. Raman chemical...

The influences of the relative humidity (RH) and storage temperature on the colonization of tomato surfaces by Salmonella Montevideo were studied. Red, ripe tomatoes (Lycopersicon esculentum) were spot inoculated in three separate trials with 100 pl (approximately 10(6) CFU) of Salmonella Montevideo and stored for 90 min at 22 degrees C under 97% RH to facilitate attachment of cells to the blos...