FIELD CROP PROTECTION FROM HARMFUL INSECTS ON AGRICULTURAL CRAFT KALAC IN 2015

Na ratarskim usjevima vrlo je bitno pratiti štetne vrste kukaca. Cilj rada bio je istražiti štetne vrste kukaca koje se javljaju na PO Kalac te provesti pravovremenu zaštitu. Istraživanje je provedeno na PO Kalac u Tompojevcima u 2015. godini na četiri kulture: pšenica, soja, suncokret i kukuruz. Štetnici su praćeni uz pomoć ljepljivih ploča, te vizualnim pregledom biljaka. Na ljepljivim pločama su utvrđene neke štetne vrste kukaca međutim nije bilo potrebe za njihovim tretiranjem. Vizualnim pregledom uočena je masovna pojava leptira Vanessa cardui na soji, te kornjaša Oulema melanopus na pšenici. Pšenica je tretirana insekticidom „Lambda 5EC“ (lambda cihalotrin) protiv žitnog balca, a soja insekticidom „Nurelle D“ na bazi klorpirifosa protiv stričkovog šarenjaka. Kemijski tretmani insekticidima su izvršeni u odgovarajuće vrijeme, te su se pokazali ekonomski isplativi. Ovo istraživanje je pokazalo da se može kontrolirati broj i štetnost kukaca te da je primjena insekticida opravdana ukoliko je pravovremena, a brojnost štetnika prelazi ekonomski prag.For arable crops it’s very important to monitor the harmful insect species . The aim of this study was to investigate insects species which occure at PO Kalac and carry out necessary protection. Field experiment were conducted on agricultural craft Kalac in Tompojevci in 2015 on four crops: soybean, wheat, sunflower and corn. Pests were monitored by sticky boards and also visually. Several insects were caught on sticky boards, but there was no need for their treatment. There was a mass appearance of butterfly Vanessa cardui L. on soybean and Oulema melanopus L. on wheat. Two treatmants with insecticides were conducted, first one „Lambda 5EC“ (lambda cihalotrin) for Oulema melanopus L. and the second one „Nurelle D" based on klorpirifos for Vanessa cardui L. Chemical treatmants with insecticides were conducted at the appropriate time, and proved to be economically viable. This research has shown that it can control the number and harmfulness of insects and that the application of insecticides is justified if the number of pest exceeding economic threshold