This multi-level study investigates the economic resilience of mango farmers during the COVID-19 pandemic and their pesticide management practices under Thailand’s Q-GAP (Quality Good Agricultural Practices) certification standard. Field surveys compared the economic outcomes of 104 certified and 151 non-certified farmers from 2019 to 2023, together with pesticide use practices during the year preceding the 2024 survey. The sample was drawn from three provinces in northern Thailand: Phitsanulok, Phetchabun, and Phichit. The statistical analysis of the collected information produced several key findings. Certified farms achieved significantly higher production and sales than non-certified farms over the five-year period, mainly due to larger farm size and higher prices obtained from premium export market sales. Certified farmers also adopted a wider range of coping strategies during the pandemic, whereas non-certified farmers mainly reduced mango investments related to mango cultivation. Certified farmers reported significantly higher rates of insecticide and fungicide adoption, as well as significantly higher annual pesticide application frequencies across all three pesticide categories. Residue analysis showed no significant difference in organophosphate (OP) residues between the two groups; however, pyrethroid (PY) residues were significantly higher among certified farms. This pattern suggests that certified farmers may apply pesticides more intensively to satisfy the aesthetic requirements of premium export markets. Regression results further showed that herbicide application frequency was the only factor marginally associated with PY-type residue levels among certified farmers, although this finding should be interpreted cautiously because of the weak model fit.

This study investigated the effectiveness of Thailand’s public good agricultural practices certification initiative (Q-GAP) in improving export-oriented mango farmers’ awareness and practices relating to food safety and quality assurance. Two groups of certified farmers in Northern Thailand (one from Chiang Mai Province and the other from Phitsanulok Province), comprising a total of 96 samples, were surveyed for comparative analysis. Many items of the comparison showed no significant differences between the two groups of farmers (specifically, the use of synthetic pesticides and non-synthetic pest control methods, record-keeping, and agrochemical safety and handling practices). One significant difference worth mentioning was related to the farmers’ ability to link the goal of the Q-GAP policy to food safety assurance; when compared to Phitsanulok, approximately 35% more farmers in Chiang Mai demonstrated such an understanding. This contradicted the more experience and days of training on Q-GAP the farmers in Phitsanulok had in comparison to those in Chiang Mai. Moreover, the rates of understanding in both areas were significantly lower than those identified in previous Q-GAP studies of less export-oriented crops. The export-oriented mango farmers might be trained to regard Q-GAP certification as a type of license to export their mango produce, rather than as a tool to improve their food safety and quality assurance.

Mango (Mangifera indica L.), particularly the ‘Nam Dok Mai’ cultivar, is an economically important fruit crop in Thailand and is widely produced in the Lower Northern Region for domestic consumption and export. However, pesticide residues in mango remain a major food safety concern because of their potential effects on consumer health and compliance with national and international maximum residue limits (MRLs). This study investigated pesticide residue contamination and assessed the dietary health risks associated with mango consumption among different age groups. A total of 255 composite mango samples were collected from production areas in Phichit, Phitsanulok, and Phetchabun provinces, Thailand. Pesticide residues were analyzed using a validated modified QuEChERS extraction method combined with gas chromatography–tandem mass spectrometry (GC–MS/MS). Multiple pesticide residues were frequently detected in the samples analyzed. Of the detected residues, 22 pesticides exceeded Thai MRL standards and 14 exceeded Codex Alimentarius MRLs. Dietary exposure was evaluated using acute and chronic hazard quotients (HQa and HQc) and cumulative hazard indices (HIa and HIc). The results showed that acute exposure to several insecticides, particularly carbofuran, lambda-cyhalothrin, and fenpropathrin, exceeded acceptable risk thresholds in all age groups. At the pesticide-class level, cumulative acute exposure to organophosphates, carbamates, and pyrethroids showed HIa values greater than 1 in several age groups, suggesting potential short-term health concerns, especially among children. In contrast, chronic exposure to individual pesticides and cumulative pesticide groups remained below the level of concern for all age groups, with HQc and HIc values below 1. These findings indicate that although long-term dietary risk from mango consumption is within acceptable levels, acute exposure to certain pesticide residues may pose non-negligible health risks. Continuous residue monitoring, stricter enforcement of good agricultural practices, and evidence-based risk management are essential to ensure mango safety and protect consumers.