Design and synthesis of novel N, N′-substituted benzamide derivatives as potential insecticidal agents against the white mango scale insect, Aulacaspis tubercularis (Hemiptera: Diaspididae)

Abstract

The white mango scale insect Aulacaspis tubercularis (Newstead) (Hemiptera: Diaspididae), which causes defoliation, drying out of young twigs, dieback, poor flowering, and decreased fruit output, causes serious damage to mango trees in Egypt. Attacks on mango fruits result in pink imperfections that lower their value as a commercial and export item. The current report aims to support the development of integrated management plans to combat A. tuberculosis and to identify more effective, eco-friendly insecticides. The bug may cause a considerable decrease in mango production and jeopardize the sustainability of mango plantation production if no management measures are taken. Currently, the application of a small number of insecticides—the majority of which have poor performance and are disruptive is the primary method used to manage A. tubercularis. In order to suppress this insect, we created novel pesticides called insect growth regulators (N, N′-substituted benzamide derivatives). By using both traditional and elemental spectroscopic investigations (IR, 1HNMR, and 13CNMR), these synthesized compounds which are linked to the most well-known insect growth regulator insecticides had their structures validated. The findings showed that A. tubercularis nymphs were more responsive to the evaluated treatments than adult females. After one day of application, all tested treatments resulted in a sizable proportion of mortality; the percentage of mortality increased with time for both A. tubercularis nymphs and adult females. Furthermore, the treatment with compound 3b was more effective than other synthesized compounds, with a LC50 of 0.318 ppm against nymphs and a LC50 of 0.993 ppm against adult females of A. tubercularis. While the treatment with compound 5 was the least toxic for controlling this pest, many assessments are essential to studying the efficacy of these treatments on advantageous insects.

Three Co(II), Ni(II) and Cu(II) Schiff base complexes incorporating 2-[(4-{[(4-methylphenyl)sulfonothioyl]oxy}phenyl)methylene] amino}benzoic acid: Synthesis, structural, dft, biological and molecular docking investigation

“…Furthermore; the 13 C-NMR spectra (Figure 1) displays the C-OH and CH3 at 192.34 and 21.64 ppm, respectively. Furthermore, the DEPT 13 C-DEPT-135 confirm the proposed structure, Figure 1.…”

“…FTIR, 1 H-NMR, 13 C-NMR, and chemical investigations all corroborated the ligand's structure. In the IR spectra, the (-CH=N) band is located at 1670 cm -1 , while the OH group stretching vibration is located at 3322 cm -1 .…”

“…Sulfonate compounds have a wide range of applications in various fields of chemistry, biology, and medicine, due to their stability, solubility, and reactivity [10,11]. One of the important applications of sulfonate compounds is their ability to act as ligands for metal ions, forming sulfonate metal complexes [12,13]. These complexes have diverse structures, properties, and functions, depending on the type of metal ion, the number and geometry of the ligands, and the presence of other coordinating groups.…”

Thiadiazole/Thiadiazine Derivatives as Insecticidal Agent: Design, Synthesis, and Biological Assessment of 1,3,4-(Thiadiazine/Thiadiazole)-Benzenesulfonamide Derivatives as IGRs Analogues against Spodoptera littoralis

“…The second and fourth larvae were kept in roughly equal-sized glass jars that weighed 5 pounds a piece, and they were given castor bean leaf disks with a diameter of 9 cm. The disks were then submerged in the concentration under test for 10 s. For the three operations that were carried out, 10 larvae were employed. − …”