602 KB0 KB200420252024Gull, ShaziyaRasheed, Raziaštevilka:1letnik:1208 str.DOI:10.14720/aas.2024.120.1.13569ISSN:1854-1941COBISSID_HOST:191584515URN:URN:NBN:SI:doc-Y6PW6J3XenZaložba Univerze v LjubljaniActa agriculturae Slovenicabiotično varstvo rastlinCalvia punctatacoccinellidsHarmonia dimidiatalistne ušiMetasyrphus latifasciatusorehpest managementpredatory potentialsap suckerwalnut aphidsPredatory insects as biological control agents against walnut aphids in Kashmir, India|Management of pests by biological control agents is a natural and environmental friendly method. It is an important part of integrated pest management programs where biological predators play a significant role in controlling various pests. During the present study, different insect pests were observed infesting walnut trees and fruits causing significant damage to the walnut orchards. Among these pests, sap suckers were found to cause notable damage out of which aphids were most dominating pests. High population of walnut aphids causes leaf drop, reduced tree vigour, nut quality and size. In addition to this, some insect predators were also observed on these walnut aphids. Six species of predaceous coccinellid beetles were found on walnut leaves in interaction with walnut aphids and they were identified belonging to sub family Coccinellinae. Among which Calvia punctata (Mulsant, 1853) and Harmonia dimidiata (Fabricius, 1781) were the most encountered species. Besides, one species from syrphidae family Metasyrphus latifasciatus (Macquart, 1859) was also observed. Moreover, extreme feeding potential was noted among these predatorsUpravljanje škodljivcev z biološkimi sredstvi je naravna in okolju prijazna metoda. Je pomemben del integriranega varstva rastlin, v katerem imajo plenilski organizmi pomembno vlogo pri nadzorovanju različnih škodljivcev. V tej raziskavi so bile ugotovljene različne škodljive žuželke, ki napadajo navadni oreh in povzročajo znatno škodo v njegovih nasadih. Med temi škodljivci povzročajo znatno škodo sesajoče žuželke, med katerimi prevladujejo listne uši. Velike populacije listnih uši povzročajo na orehu odpadanje listja, zmanjšujejo vitalnost dreves, velikost in kakovost orehov. V raziskavi so bile opažene tudi plenilske žuželke, ki se hranijo z listnimi ušmi. Na listju navadnega oreha je bilo ugotovljeno šest vrst plenilskih polonic, ki se hranijo z listnimi ušmi in pripadajo podružini Coccinellinae. Med njimi sta bili najbolj pogosti vrsti Calvia punctata (Mulsant, 1853) in Harmonia dimidiata (Fabricius, 1781). Med temi plenilskimi žuželkami je bila najdena tudi vrsta muh iz družine trepetalk, vrsta Metasyrphus latifasciatus (Macquart, 1859). Pri vseh teh plenilskih žuželkah je bil ugotovljen velik potencial hranjenja z listnimi ušmiTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Biotehniška fakulteta