Through a field experiment, the dissipation pattern of dimethoate in grapes was evaluated during December 2020 - February 2021. Dimethoate 30%EC was sprayed twice at ten-days interval at recommended (X) dose (445 g a.i ha-1) and double the recommended (2x) dose (890 g a.i ha-1). The samples were collected from 0 (2hr), 1, 3, 5, 7, 10, 15 and 20 days or till degradation to below detectable level (BDL) and at harvest time. The residues were extracted by the modified QuEChERS method and analyzed by LCMS. The method performance was satisfactory in terms of SANTE guidelines and with good linearity (r2>0.99). The mean total dimethoate residue including omethoate was 1.047 and 2.168 mg kg-1 at x and 2x doses, respectively with half-lives of 5.47 and 5.59 days. The calculated Risk Quotient (RQ) at both x and 2x dose with Good Agricultural Practices (GAP) indicated that for dimethoate these are not safe for human health due to the intake of residue.

Field and laboratory experiments were conducted to study the effect of simple decontamination methods and processing on imidacloprid, dimethoate, and emamectin benzoate residues in grapes and their processed products using Liquid-Chromatograph Mass Spectrometer validated method. Among the decontamination methods evaluated, sodium chloride (2%) solution was found effective and contributed to the reduction of imidacloprid (77.55%), dimethoate (83.27%) and emamectin benzoate (77.28%) residues in mature grapes. Grapes were processed into various products viz., fresh juice, squash and raisin as per standard effective steps for each product. Based on decontamination experiment ndings, washing with sodium chloride (2%) solution was included as an additional step in the standard protocol and has resulted in substantial removal of surface residues of selected insecticides. The processing factor calculated was less than one for all the products.

A field experiment was conducted to study the rate of dissipation of thiamethoxam 25% WG in vegetable cowpea. Thiamethoxam 25%WG @ 0.24 ml l-1 was sprayed at pod formation stage, and samples of pods were harvested at 0 (2 hr after spray), 1, 3, 5, 7, 10, 15 days after spray. Residues were estimated using liquid chromatography tandem mass spectrometer (LC-MS/ MS) at the All-India Network Project on Pesticides Residues, College of Agriculture, Vellayani, Kerala. The mean initial residue was found to be 0.53 μg g-1, and residues were observed persisting up to three days and reached below quantification level on fifth day.

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Aim: The present study was undertaken to assess IPM modules against Fall Armyworm in Maize through Frontline Demonstration and its economic impact. Place and Duration of Study: The present study was carried out in Ananthapuramu district of Andhra Pradesh during the period 2020-2023. Methodology: The main objective of frontline demos is to demonstrate recently available crop production and protection technology, as well as their management practices, in a farmer's field in a micro farming setting. The KVK, Reddipalle conducted front line demonstrations on maize throughout rabi seasons of 2020-21, 2021-22 and 2022–2023, as part of annual technical programme of Krishi Vigyan Kendra, Reddipalle, Ananthapuramu district organised 30 FLD locations in KVK operational area of adopted villages. Following a group discussion, a list of farmers was created, and those who were chosen received specialised training in various parts of suggested protection technologies. Results: According to the current results and subsequent analysis of the results, maize reported a higher total (91120 Rs ha-1) when compared to farmers practice (74309 Rs ha-1). The benefit cost ratio was significantly higher in the recommended approach (2.51) when compared to farmers practice (2.12). The higher grain output and better market pricing of the produce may be the causes of the maize demonstration's higher net returns and B: C ratio. Conclusion: The FLD intervention is highly effective among maize farmers with increased net returns of 13618 rupees per hectare. Hence, FLD plays a vital role in dissemination of technology on a community basis when compared to other approaches.

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Background: Blackgram [Vigna mungo (L.) Hepper] has significant agronomic and nutritional significance. Its productivity is insufficient to fulfil the expanding local demand in India. Increasing its productivity using appropriate agronomic practices is crucial. With this background, an experiment was conducted to study the effect of foliar application of liquid organic bio-stimulants on development, production and physiological characteristics of blackgram under irrigated conditions. Methods: Seven treatments comprising recommended dose of fertilizers (RDF) with foliar spray of dhasagavya, liquid rhizobium, fish amino acid, panchagavya, PPFM and seaweed extract at 1% and 3%, respectively were tested in randomised block design with three replications. The dimension of blackgram quantitative characters, viz., grain yield, plant height, number of branches per plant, dry matter production (DMP), leaf area index (LAI), number of pods per plant, number of seeds per pod, pod weight per plant, pod length, crop growth rate, total chlorophyll content, soluble protein content and nitrate reductase activity were reduced using principal component analysis (PCA). Result: The PCA was performed on all the attributes as correlation between the quantitative characters was found to be stronger among most of the biometric observations. It was noticed that almost 67% of the data’s total variability, as reflected by the first two principal components. It demonstrated that grain production, DMP, nitrate reductase activity, pods per plant and leaf area index were the primary contributors.