Journal of Food, Agriculture and Environment

Vol 7, Issue 1,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Croplife-B with nitrous oxide or carbon dioxide extends shelf life of green beans (Phaseolus vulgaris L.) at ambient temperatures


Abbas F. Al-Jamali *, Majde T. Bani Hani

Recieved Date: 2008-09-10, Accepted Date: 2008-12-11


Croplife-B is said by the manufacturer to stimulate the production of phytoalexins and to reduce fungal growth in sprayed plants. To investigate the effects of Croplife-B preharvest sprays and increased postharvest carbon dioxide (CO2) and nitrous oxide (N2O) concentration on pod quality and shelf life, off-season green bean plants, winter-grown in the warm Jordan Valley, were sprayed twice at a rate of 270 ml/ha Croplife-B. Green bean pods were kept after harvest in 100 kPa N2O, 20 kPa CO2 or 60 g dry ice (frozen CO2) in 120-litre barrels for twenty days. Results indicated that Croplife-B accelerated the production time and reduced mold appearance and development during and after storage when used alone or in combination with CO2, N2O or dry ice treatments. Croplife-B did not affect firmness, total soluble solids, pH, titratable acidity, color, volume or moisture-content loss of green bean pods stored at 23-16ºC, maximum-minimum ambient temperatures and 88% relative humidity. Nitrous oxide and CO2 treatments resulted in decreased water loss from the pods and maintained regular pod shape throughout the storage period, with N2O being the most efficient treatment. Nitrous oxide and CO2 resulted in improved bean pod coloration at the end of storage time. Firmness and titratable acidity decreased while the pH increased more when beans were treated with N2O and CO2 during the storage period than in the dry ice treatment or control. White mold did not appear for 20 days on pods treated with N2O and CO2 when stored at 16-23°C and 88% relative humidity. With dry ice treatment the white mold appeared at 10 days of storage. Dry ice treatment reduced the appearance of mold, maintaining it at under 50% for 20 days. The beneficial effect of N2O and CO2, coupled with Croplife, in inhibiting the mold continued for 10 days after the bean pods were removed from storage on Day 20. The results of these experiments are consistent with Croplife-B acting as an elicitor of phytoalexins.


Croplife-B, organic, carbon dioxide, nitrous oxide, dry ice, green beans, Phaseolus vulgaris L., modified atmosphere, temperature

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 1
Category: Food and Health
Pages: 38-43

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :