Aphidicidal activity of nano-emulsions of spearmint oil and carvone against Rhopalosiphum maidis and Sitobion avenae.

Different species of aphids, responsible for severe yield losses of cereal crops including wheat, (Triticum aestivum L.) are managed by insecticides, which are harmful to organisms and the environment under field conditions. Therefore, an environment friendly aphidicidal product of plant origin is required.

Novel indazolylchromones: synthesis, fungicidal evaluation, molecular docking and aquatic toxicity prediction.

Fungal diseases cause substantial loss to agricultural crops, affecting both quantities and quality. Although several methods are used for preventing disease incidence, fungicides remain crucial for higher yields and better quality. But in the past, the efficacy of several fungicides has decreased due to increased cases of fungicide resistant.

Green synthesis, structure-activity relationships, molecular docking, and antifungal activities of novel prenylated chalcones.

A series of 16 novel prenylated chalcones () was synthesized by microwave-assisted green synthesis using 5-prenyloxy-2-hydroxyacetophenone and different benzaldehydes. Comparisons were also performed between the microwave and conventional methods in terms of the reaction times and yields of all compounds, where the reaction times in the microwave and conventional methods were 1-4 min and 12-48 h, respectively. The synthesized compounds were characterized using different spectroscopic techniques, including IR, H-NMR, C-NMR, and LC-HRMS.

Synthesis of benzothiazole-appended bis-triazole-based structural isomers with promising antifungal activity against .

In order to explore new antifungal agrochemicals, we reported the synthesis of two series 5a-f, 6 and 7a-f, 8 of benzothiazole-appended bis-triazole derivative-based structural isomers using a molecular hybridization approach. The synthesized compounds were tested for fungal growth inhibition against the plant pathogen . All the synthesized compounds showed excellent antifungal activity in their minimum concentrations (10-0.

Bioefficacy evaluation of ferrocenyl chalcones against and infestation in tomato.

The present study reports, bioefficacy evaluation of effective compounds against and in pot cultured tomato. The identified five most effective compounds, i.e.

Bioefficacy evaluation of chalcone derivatives against infecting rice, L.

A series of chalcones () were synthesized, characterized (using IR and 1H NMR techniques), and evaluated with an objective to manage rice root-knot nematode (RRKN) () both under pluronic gel and field conditions. Out of these fourteen compounds, 1-(4-fluoro-phenyl)-3-phenyl-propenone () and 1,3-diphenyl-propenone () showed promising and dose dependent activity at 10, 20, and 40 mg L. A significant reduction in penetration of second stage juveniles (Js) in rice roots was observed in compounds (9.

Synthesis, Biological Evaluation, and QSAR Studies of 3-Iodochromone Derivatives as Potential Fungicides.

Despite the emergence of novel biotechnological and biological solutions, agrochemicals continue to play an important role in crop protection. Fungicide resistance is becoming a major problem; numerous cases of fungicide resistance have occurred worldwide in the last decade, resulting in the loss of several fungicides. The discovery of new molecules has therefore assumed critical importance in crop protection.

Microwave assisted synthesis, characterization and biological activities of ferrocenyl chalcones and their QSAR analysis: Part II.

A series of ferrocenyl chalcones using acetylferrocene, with ferrocenyl group at the keto carbonyl group, and different aldehydes were synthesized and their bioefficacy evaluation was done against , and In continuation of our quest for potent crop protection products, in the present study, a series of 18 substituted ferrocenyl chalcones were synthesized in which ferrocenyl group was attached to the aldehyde moiety, using ferrocenecarboxyaldehyde and different acetophenones by microwave method (MM) and conventional method (CM) [: MM 1 to 5 min; CM 12-40 h] and characterized by various techniques viz. IR, LC-HRMS, H-NMR and C-NMR. fungicidal activity showed that compound, (2)-1-(5-Chloro-2-hydroxyphenyl)-3-ferrocenyl-prop-2-en-1-one ( (ED = 21.

Amphiphilic polymer based nanoformulations of mancozeb for management of early blight in tomato.

Controlled release (CR) nanoformulations of Mancozeb (Manganese-zinc double salt of -bisdithiocarbamic acid), a protective fungicide, have been developed using poly (ethylene glycols) (PEGs) based functionalized amphiphilic copolymers and evaluated for the management of early blight in tomato. During the field experiment, it was observed that number of infected leaflets/plants were less in developed formulation treated plants as compared to commercial products. Number of infected leaflets per plant was 2.

Microwave Assisted Synthesis, Characterization and Biological Activities of Ferrocenyl Chalcones and Their QSAR Analysis.

A new microwave method (MM) has been developed for the synthesis of a series of 16 substituted ferrocenyl chalcones using acetylferrocene () with different aldehydes () and comparing it with conventional method (CM). The synthesized compounds were characterized by various spectroscopic techniques IR, HR-MS, H NMR, and C NMR. The time required for completion of reaction in MM varied from 1 to 5 min as compared to CM which required 10-40 h.

Insecticidal activity of phenolic acid amides against brown planthopper (BPH), (Stål) and their QSAR analysis.

A series of 42 phenolic acid amides, synthesized using different phenolic acids (salicylic acid, 3-hydroxy cinnamic acid, p-coumaric acid, caffeic acid, ferulic acid, o-coumaric acid, cinnamic acid and amines (propyl amine, hexyl amine, heptyl amine, undecyl amine, hexadecyl amine, octadecyl amine) were screened for their insecticidal activities against Brown Planthopper (BPH), . These phenolic acid amides showed moderate to good insecticidal activity with the lowest LC value of 63.84 ppm from N-propyl-2-hydroxycinnamamide.

Development of controlled release formulations of thiram employing amphiphilic polymers and their bioefficacy evaluation in seed quality enhancement studies.

Controlled release formulations of Thiram (Dimethylcarbamothioylsulfanyl-N,N-dimethylcarbamodithioate), a contact fungicide, have been prepared using laboratory synthesized poly(ethylene glycol) (PEG) based functionalized amphiphilic copolymers. The kinetics of thiram from developed controlled release (CR) formulations were studied in comparison with that of the commercially available 75 WS. Release from the commercial formulation was faster than with the developed CR formulations.