Pesticide Residue Analysis of three Different Pesticides used against Helicoverpa Armigera (Hubner) in Tomato Crop
Pesticide Residue Analysis of three Different Pesticides used against Helicoverpa Armigera (Hubner) in Tomato Crop
Ahmad-Ur-Rahman Saljoqi1, Sumayya Amin1, Muhammad Salim1*, Taufiq Nawaz2 and Farida Anjum3
ABSTRACT
Pesticide residue analysis experiment of three different pesticides used against Helicoverpa armigera was conducted in tomato crop during 2019. The experiment was carried out in (RCBD) Randomized Complete Block Design. There were four treatments i.e., Cypermethrin, Imidacloprid, Lamda cyhalothirn and control. Each treatment was replicated three times. Lowest mean percent fruits infestation (2.84%), highest yield per treatment (9.56 kg) per plot, highest ascorbic acid content (11.06 mg/100g), fresh weight of treated tomato fruits (101.45 g) and lowest content of mean pesticides residue (0.054%) was recorded in plots treated with Imidacloprid. It was followed by Lamda cyhalothrin where 5.97%, 8.02 kg, 8.18 mg/100g, 89.18 g, and 0.071% of mean percent fruits infestation, yield per treatment, ascorbic acid content, fresh weight of treated tomato fruits and content of mean pesticides residue was recorded, respectively. Highest content of pesticide residue (0.088%) was obtained from tomatoes treated with Cypermethrin. Our results further indicated that highest mean percent fruit infestation (8.92%) per plant and fresh weight (92.57g) were recorded from fruits after 3 days of the post treatments, while the lowest mean percent fruit infestation (8.35%) and fresh weigh of tomato fruits (83.46g) were recorded from plants after 7 and 10 days, respectively. Significantly highest ascorbic acid concentration (9.68 mg/100g) was recorded on day 10 while lowest (9.19 mg/100g) was recorded on 3rd day post treatment. Similarly, highest percent concentration of pesticide residue (0.080%) was recorded on day 1 while lowest (0.0624%) was recorded on 10th day of post treatment. Results showed that Imidacloprid is significantly better against tomato fruit worm by reducing the fruit infestation, resulted in lowest percent concentration of pesticide residue on tested tomato fruits as compared to Lamda cyhalothrin and Cypermethrin. Based on the results of the current study Imidacloprid is recommended in the IPM as safe pesticides against tomato fruit worm in tomato crop.
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