A CONCISE OVERVIEW ON HETEROCYCLIC COMPOUNDS EXHIBITING PESTICIDAL ACTIVITIES

treatment of animals and human as a therapeutical agent. Heterocyclic compounds show good herbicidal, insecticidal, antifungal, nematocidal, antibacterial and antimicrobial activities. The present review is an attempt to briefly compile the heterocyclic compounds for their pesticidal properties.

Types of heterocyclic compounds : It is hard to mention all heterocyclic compounds due to their very large number, however a general classification of heterocyclic compounds on the basis of types ofhetero atom present in the ring is given in Table:1.

Sulphur Heterocycles
Shows herbicidal, insecticidal, fungicidal and other pesticidal activity given in Fig.1

Nitrogen and oxygen heterocycles
Shows herbicidalInsecticidal andother biological activity

Sulphur and nitrogen heterocycles
They are good insecticides, herbicides and most of agrochemical belongs to this category.
The findings of antimicrobial activity showed that several of the derivatives had much greater antibacterial activity than thiadiazole copper and bismerthiazol towards R. solanacearum, Xac, and Xoo. Abbass and Zimam [20] developed novel pyramidine and "1,2,3,4-tetrazole"derivatives based on sulfadiazine ( Figure  15) and tested them on 2 kinds of bacteria: Porphyromonasgingivalis (Gram-negative) or Streptococcus spp. (Grampositive). All the produced compounds were mild inhibitors, although Gram-negative bacterial strains were more active except for S. aureus, 1,3,4-oxadiazole was the most effective inhibitor of growth of bacteria.

Antiviral Activity
Viral diseases, such as the hepatitis, herpes,influenza, common cold,HIV,gastroenteritis, chickenpox, and the Ebola virus, are among the most prevalent infections throughout the world. Antiviral treatment is crucial in preventing viral infections from spreading.

Conclusion:-
Heterocyclic compounds are the complex group in organic chemistry. These compounds are essential in a number of ways. Pharmacology and biochemistry are the two main fields that collectively contribute to the holistic efficacious vitality of the compounds having activity against pests. Synthetic organic chemistry finds huge application that requisitely meet the needs of modern society and mankind by synthesizing new biologically active heterocyclic compounds. Most importantly they safeguard crop health by killing the harmful pest and plants that restrict its growth. Besides, heterocyclics are also useful in treatment of animals and human as a therapeutical agent. Heterocyclic compounds show good herbicidal, insecticidal, antifungal, nematocidal, antibacterial and antimicrobial activities. The present review is an attempt to briefly compile the heterocyclic compounds for their pesticidal properties. 18 N-phenylpyrazolyl aryl methanones derivatives Larvicidal activity [32]