TY - JOUR

T1 - Efficacy of Hot Water Treatment for Postharvest Control of Western Flower Thrips, Frankliniella occidentalis in French Beans

AU - Mwando, Nelson L

AU - Ndlela, Shepard

AU - Subramanian, Sevgan

AU - Mohamed, Samira A

AU - Meyhöfer, Rainer

N1 - Funding Information: The authors wish to thank 's postharvest project staff for their technical assistance and Abdelmutalab Gesmalla for assistance in statistical analysis. The authors gratefully acknowledge the financial support for this research by the following organizations and agencies: BioInnovate Africa (grant number BA‐C1‐2017‐06_icipe), the Swedish International Development Cooperation Agency (Sida), the Swiss Agency for Development and Cooperation (SDC), the Federal Democratic Republic of Ethiopia and the Government of the Republic of Kenya. The views expressed herein do not necessarily reflect the official opinion of the donors. icipe

PY - 2022/10

Y1 - 2022/10

N2 - BACKGROUND: The western flower thrips, Frankliniella occidentalis is a quarantine pest of French beans that requires a phytosanitary treatment to meet quarantine requirements for strict lucrative markets. In this study, the efficacy of hot water treatment against F. occidentalis eggs and its effects on the post-harvest physicochemical quality parameters of French beans was evaluated.RESULTS: The immersion time of 8.01 min (95 %, CL 7.77-8.24) was predicted by the probit model as the minimum time required to achieve a 99.9968 % control level. Confirmatory tests with a large number of F. occidentalis eggs were performed to validate the estimated time to achieve probit-9 control level, and there were no survivors from the 50,103 eggs treated. Likewise, none of the 55,364 eggs exposed to 45 ± 0.2 °C for 7 min (observational time) survived. The effect of the treatment schedule on French beans quality parameters was assessed and there were no differences in weight loss, moisture content, total soluble solids, titratable acidity, pH, and reducing sugars between treated and untreated samples.CONCLUSION: Our results indicate that hot water treatment at 45 ± 0.2 °C for a duration of 8.01 min is an effective phytosanitary treatment for the control of Frankliniella occidentalis on French beans, with no significant impact on pods quality. This article is protected by copyright. All rights reserved.

AB - BACKGROUND: The western flower thrips, Frankliniella occidentalis is a quarantine pest of French beans that requires a phytosanitary treatment to meet quarantine requirements for strict lucrative markets. In this study, the efficacy of hot water treatment against F. occidentalis eggs and its effects on the post-harvest physicochemical quality parameters of French beans was evaluated.RESULTS: The immersion time of 8.01 min (95 %, CL 7.77-8.24) was predicted by the probit model as the minimum time required to achieve a 99.9968 % control level. Confirmatory tests with a large number of F. occidentalis eggs were performed to validate the estimated time to achieve probit-9 control level, and there were no survivors from the 50,103 eggs treated. Likewise, none of the 55,364 eggs exposed to 45 ± 0.2 °C for 7 min (observational time) survived. The effect of the treatment schedule on French beans quality parameters was assessed and there were no differences in weight loss, moisture content, total soluble solids, titratable acidity, pH, and reducing sugars between treated and untreated samples.CONCLUSION: Our results indicate that hot water treatment at 45 ± 0.2 °C for a duration of 8.01 min is an effective phytosanitary treatment for the control of Frankliniella occidentalis on French beans, with no significant impact on pods quality. This article is protected by copyright. All rights reserved.

KW - Phaseolus vulgaris

KW - egg disinfestation

KW - physicochemical parameters

KW - phytosanitary treatment

KW - thripidae

UR - http://www.scopus.com/inward/record.url?scp=85133913982&partnerID=8YFLogxK

U2 - 10.1002/ps.7051

DO - 10.1002/ps.7051

M3 - Article

C2 - 35730382

VL - 78

SP - 4324

EP - 4332

JO - Pest management science

JF - Pest management science

SN - 1526-498X

IS - 10

ER -