Influence of Artificial Infestation with Western Corn Rootworm Eggs on Maize Morphology

A field experiment was carried out in Bečej (Serbia) during 2014 with Serbian maize cultivar NS-640. In experimental field, 96 plants were selected, marked, and arranged in 48 pairs. In each pair, one plant was artificially infested in root zone with 4 mL of Diabrotica v. sp. virgifera eggs 0.125% agar suspension (D plants). The maximum measured height on D (infested) and C (control) plants was 295 cm and 320 cm, respectively. The maximum measured diameter on D plants was 27.93 mm and on C plants was 32.13 mm respectively. The maximum recorded number of leaves was 15 on both categories. Statistical analysis shows that differences between plant diameters and the number of leaves between D and C plants are significant

Zavisnost brzine razvića Plodia interpunctella od veličine životnog prostora i količine dostupne hrane

Cilj ovoga rada je bio da ustanovi da li brzina razvića bakrenastog plamenca Plodia interpunctella zavisi od veličine prostora, količine dostupne hrane i uticaja uznemiravanja larvi. Ogled je postavljen po metodi slučajnog blok sistema 2x3. U ukupno 18 teglica sa po 50 mL žutog kukuruznog brašna uneto je po 10 (T1), 20 (T2) ili 50 (T3) jaja P. interpunctella, u po šest ponavljanja. Teglice su podeljene u dva bloka zavisno od toga da li larve nisu uznemiravane mešanjem supstrata (blok I) ili jesu (blok II). Rezultati su pokazali da količina dostupne hrane i veličina životnog prostora veoma utiču na brzinu razvića, dinamiku eklozije imaga i dinamiku celokupnog razvića bakrenastog plamenca

Plants as Bio-Insecticides in the Service of the Suppression of Potato Tuber Moth in Storage

Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is economically very important pest of potato and other solanaceous plants in the field and warehouse. Frequent and excessive use of insecticides leads to development of insects resistance, environmental pollution, and lives residues in food. All this implicated as a obligatory applications of botanical insecticides. Research in this area is increasingly attracting attention as the kingdom of plants is an inexhaustible source of active ingredients with insecticidal properties. This is the only way in the registration and appropriate use of eco-friendly active ingredients as pesticides

Otpornost sušenih plodova šljive, kajsije i višnje na infestaciju Plodia interpunctella (Lepidoptera: Pyralidae)

The aim of this study was to assess the degree of resistance of dried plums, apricots and cherries to infestation caused by Indian meal moth (Plodia interpunctella), the major pest of dried fruits in the world. Based on the results of Index of susceptibility for insect development and the Susceptibility rating, we found that all three tested dried fruits were resistant to infestation by P. interpunctella, while dried plums were the least resistant. The most resistant were dried apricots, on which no P. interpunctella individual reached the pupal stage.Cilj ovog rada je da proceni otpornost sušenih plodova šljive, kajsije i višnje na infestaciju Plodia interpunctella, ekonomski najznačajnijom štetočinom sušenog voća u svetu. Izračunavanjem indeksa za ocenu pogodnosti supstrata za razviće insekta i stepena otpornosti hraniva na infestaciju utvrđivan je nivo otpornosti korišćenih plodova. Zaključeno je da su sve tri vrste sušenog voća otporne na infestaciju P. interpunctella, ali je sušena šljiva najmanje otporna. Najotpornije su sušene kajsije, na kojima nijedna jedinka P. interpunctella nije dostigla stadijum lutke

Kukuruzni plamenac, Ostrinia Nubilalis hbn. (Lepidoptera, Crambidae) kao štetočina

European Corn Borer is a corn pest worldwide, present with different number of generation and races. The economic level of looses vary from 0-100 %. Apperance, harmffulness and voltinism are consequences of vegatation, agrometerological conditions, cultivars and technology. In Europe and north America are detected Z, E and H strain of pest. As a rule all strains are present in corn field. Exception is France, where is Z strain present in corn, and E strain in hop and mugwort. The presence of different pheromone isomer is the base of strain differentiation.Kukuruzov plamenac je štetočina kukuruza prisutna sa različitim brojem generacija i tipova. Nivo ekonomskih gubitaka u godišnjoj proizvodnji varira od 0-100 %. Pojava, štetnost i voltinizam posledica su uticaja vegetacije, agrometeoroloških uslova, sortimenta i tehnologije gajenja. Na evropskom i severoameričkom prostoru utvrđeno je prisustvo Z, E i H tipa štetočine. Uglavnom su ovi tipovi prisutni u usevu kukuruza. Izuzetak je Francuska gde je Z tip identifikovan u kukuruzu, a E tip na hmelju i crnom pelinu. Razdvojenost na tipove uslovljena je prisustvom feromona i njihovom funkcionalnom praktičnom upotrebom u privlačenju mužjaka

Population Dynamics of WCR and ECB in Maize Field in Bečej, Vojvodina Provance

WCR and ECB are maize pest present worlwide in Corn Belt. The documented economic level of looses and plant damages of this two pests vary up to 100 %. Experiment was carried out in Vojvodina provance, region Bačka, during vegetation 2014-2015, from Jun until September. During weekly inpection for tree month we recorded present of WCR and ECB in pheromone traps. Both pests shows fluctuating flight during experimental years. The higest catch of WCR (71 specimens - 8 August 2015) and ECB (14 specimens - 14 August 2014). WCR flight shows similarity over the two years. But, ECB flight is more extended in 2015

Moljac krompira kao štetočina – od prisutne do visoko ekonomski značajne vrste u Srbiji

Potato tuber moth, Phthorimea operculela Zeller (Lepidoptera: Gelichiidae) becoming economically very important pest of potato in open field condition in West region of Serbia. Surveillance and monitoring are organized by Serbian Forecast and Report Services (Prognozno Izveštajna Služba Srbije - PISS) from 2013 by phero-traps. At the territory of Extension Services Čačak monitoring represent a part of obligatory measures under PISS coordination. In this area pest is present from 2013. High population is registered during 2015. The imposes need to continue pest monitoring and documenting the damage from the both (field and storage).Moljac krompira (MK), Phthorimea operculela Zeller (Lepidoptera: Gelichiidae) postaje ekonomski sve značajnija štetočina u regionu Zapadne Srbije. Monitoring vrste sprovodi se feromonskim klopkama od 2013. godine u okviru redovnih mera praćenja koje koordinira Prognozno Izveštajna Služba Srbije. Na teritoriji PSS Čačak, štetočina je prisutna od 2013.godine, a u vegetaciji 2015. godine registrovana je visoka brojnost. Nameće se neophodnim nastavak moniotoringa i dokumentovanje šteta na terenu