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Submitted: 21 June 2017 Modified: 21 June 2017
HERDIN Record #: CAR-UCBCF-17062115465856

Bioaccumulation of pesticide residues in vegetables and weeds in high-input agricultural systems in CAR.

David Y. Fomeg-as,
Wileen Chiara T. Lasangen,
Carljohsnon G. Anacin,
Romeo A. Gomez Jr.,
Gaudelia A. Reyes

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High-input agricultural systems are characterized by intensive agricultural farming on which farmers in the area depend for livelihood. In these ecosystems. however, contaminants from pesticides used by the farmers pose risks to human and environmental health. Thus, growing concerns on pesticide threats to public health due to residue levels in food continue to emphasize the need or judicious use of pesticides.


This research project, therefore, aimed to assess the occurrence of bioaccumulation of toxic synthetic chemicals, particularly pesticides, in selected commercially important crops in two (2) commercially producing vegetable farms in Loo, Buguias and in Mount Data, Bauko, Mountain Province. Two common weeds were likewise studied. The analysis was done through Gas Chromatography. With this study, the researchers came up with benchmark data on the occurrence of bioaccumulation of pesticides, as well as their levels, in selected crops and weeds in the two farming areas.


As seen in this research, there is definitely an occurrence of bioaccumulation of pesticide residues in the crops and weeds thriving in the two study sites- Loo, Buguias, Benguet and Pactil, Mt. Data, Mountain Province. A total of 104 pesticide residues have been detected through gas chromatography analysis and these are known to be toxic as seen in other literatures. Presence of pesticide residues and their levels of concentrations were also determined based on parameters such as site, season, sample, and farming practices.

Publication Type
Research Report
Date

Objectives

In general, the research project came up with benchmark data on the occurrence of bioaccumulation of pesticides, as well as their levels, in selected crops in commercially producing vegetable farms in Loo, Buguias and in Mount Data, Bauko, Mountain Province. Moreover, it may also lead to the establishment of the extent of bioaccumulation whether toxic accumulations have also occurred in surrounding vegetations adjacent to these farms. This is determined by analyzing the weeds in the surrounding areas for pesticide residues.


This means that the detection (of the presence) of these residues in plants/vegetation outside the farm, i.e., towards the non-cultivated areas, or forest (which is not normally sprayed with these chemicals) is an indication that accumulation could have also possibly occurred, not just in the farms, but must have also escaped from the farms to these forests/non-cultivated areas.


Specific Objectives of the Studies (Studies 1 and 2)


1. Determine the presence and level of concentration pesticide residues in cabbage, potato, garden pea, and two common weeds found within and on the nearby areas of the ;


2. Determine the toxicity level of pesticide residues on there representative species based on Maximum Residue Levels (MRL);


3. Compare the results of the presence and level of concentration of pesticide residues in the crops and weeds gathered from the two study sites;


4. Compare the results of  the presence and level of concentration of pesticide residues in the selected crops and weeds during wet and dry seasons; and


5. To look into the farming and pesticide application practices of farmers in the two municipalities.

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