Division of Basic Sciences
(During the Period of 2019-2023)
- Washing of tomato under running water dislodges 63 to74% of pesticide residues. Boiling of tomato juice to puree/sauce is the major steps to eliminate pesticides. The rate of degradation of imidacloprid is lower than that of other pesticides during processing of tomato into its products. During the processing of tomato, imidacloprid was degraded to different compounds, which were chracterised as imidacloprid urea (I), imidacloprid guanidine (II), N-methyl nitrosoguanidine (III), 6-chloro nicotinaldehyde (IV), deschloro imidacloprid guanidine(V), and 6-chloro nicotinicacid (VI).
- Peeling of guava is the best option to avoid contamination of many pesticides in processed products. Different degradation products of imidacloprid and lambdacyhalothrin were isolated and characterized during the processing of guava.
- During the processing of mango to its RTS juice, beverage, osmotically dehydrated product and bar, the residues of acephate, carbendazim and imidacloprid went down to significant levels. In OD and bar, the degradation level of acephate and carbendazim were found above 85%, whereas imidacloprid was found below detectable limit. During the preparation of dry mango powder, sundry was found more effective to degrade some pesticides than oven drying process.
- During the processing of moringa leaf powder, washing of leaf with running water did not dislodge pesticides in significant amount. Only 5 to 30% reduction of pesticides during drying process was observed. Hot water treatment of contaminated moringa dry leaf powder for 10 min removed deltamethrin and chlorpyriphos by 94 and 86%, respectively.
- The tested pesticides, lambda cyhalothrin, tebuconazole, difenoconazole, and trifloxystrobin were found to be dissipated above 85% during the processing of papaya bar and osmotically dehydrated products.
- During the processing of onion to its dry powder, drying in hot air oven at 45⁰C was found more efficient in dissipating pesticides than that in solar dryer maintained at the same temperature. Among the pesticides, the dissipation of chlorpyriphos is more than other three pesticides. The degradation of lambda cyhalothrin and hexaconazole in hot air oven was moderate, whereas it was very low in solar drying process.
- In the market samples of dry curry leaf powder, pesticides viz., imidacloprid, carbofuran, acetamiprid, thiomethoxam, profenophos, ethion, azoxystrobin, pyraclostrobin, tebuconazole and buprofezin were detected in significant level. Washing of fresh curry leaf with running water did not dislodge pesticides in significant amount. Running water and hot water treatment dislodged about 22 and 38% of ethion, respectively.
- During the processing of red chilli to powder, the levels of pesticide residues were found to decrease; however the processing factors for many pesticides are very high. Washing of fresh chilli before drying was found to decrease pesticide load in chilli powder. Processing factors for cyfluthrin, thiomethoxam, carbendazim, acephate, acetamiprid and tebuconazole are alarmingly high (>3.0).
(Best 10/High Impact)
- Choudhury PP and Chandrasena NR (2022) Colonizing Taxa (Weeds) as sources of natural pigments and dyes. Weeds - Journal of the Asian-Pacific Weed Science Society 4(1): 36–61.
- Mahesh SS, Choudhury PP, Mitro SR and Raj A (2021) Degradation of pyrazosulfuron-ethyl in rice ecosystem by Aspergillus terreus. Current Journal of Applied Science and Technology, 40(26): 3- 10, 2021. DOI: 10.9734/CJAST/2021/v40i2631519.
- Choudhury PP, Parey S, Yadav U, Tiwari S (2021) Mucor assisted degradation of sulfosulfuron in irrigation water. Indian Journal of Experimental Biology, 59 (12), 884-890.
- Kakotiya V and Choudhury PP (2020) Photochemical behaviour of pretilachlor on black soil surface. Int. J. Global Environmental Issues, 19(4): 306–318. DOI: 10.1504/IJGENVI.2021.10036340
- Rohit Pandey and Partha P. Choudhury (2020) Aspergillus niger-mediated degradation of orthosulfamuron in rice soil. Environmental Monitoring and Assessment. 192(Suppl 1): 813. DOI : 10.1007/s10661-020-08707-2
- Rohit Pandey and Partha P. Choudhury PP, Singh A and Singh R (2019) Biodegradation of topramezone by a Trichoderma isolate in soil. Weeds – Journal of Asian-Pacific Weed Science Society 1(1): 43-54.
- Choudhury PP (2017) Leaf cuticle-assisted phototransformation of isoproturon. Acta Physiologiae Plantarum 38(8): Article 188. (DOI 10.1007/s11738-017-2471-0)
- Choudhury PP and Pandey R (2017) Phototransformation of isoproturon in soil. Indian Journal of Weed Science 49(4): 391–395.
- Ajoy Saha, Rakesh Kumar Ghosh, P.-K. Jesna, and Partha P. Choudhury (2020) Bioindicators of Pesticide Contaminations. In: Inamuddin et al. (eds.), Sustainable Agriculture Reviews 48, Sustainable Agriculture Reviews 48, Springer Nature Switzerland AG 2021 [https://doi.org/10.1007/978-3-030-54719-6_5]
- Choudhury PP (2019) Transformation of herbicides in the environment. pp. 415-442. In: Herbicide Residue Research in India, Eds. Sondhia S, Choudhury PP and Sharma AR, SpringerNature Singapore Pte Ltd
- Partha P. Choudhury, Dibakar Ghosh, Amitava Sanyal, Debi Sharma (2018) Herbicide use in agriculture: An Indian perspective. In: Fifty Years of Weed Research in India, Eds. Sushil Kumar and JS Mishra. Indian Society of Weed Science, Jabalpur
Awards & Recognitions:
Sharma Debi, Choudhury PP and Ranjitha K (2020) Patent application no. 202041029424 for “Herbiwash for Fruits & Vegetables “ submitted on 10/07/2020
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