Problems in Ceuthorrhynchus spp. Control on Rapeseed in the Region of Serbia
Problemi u suzbijanju Ceuthorrhynchus spp. u uljanoj repici u Srbiji
Pregled/ Otvaranje
Autor
Indjic, Dusanka
Vukovic, Slavica
Grahovac, Mila
Bursic, Vojislava
Sunjka, Dragana
Ključne reči
RapeseedCeuthorrhynchus spp.;
Insecticides
Chlorpyrifos + bifenthrin
Deltamethrin
% of infested plants
Adult abundance
Number of larvae/plant
Uljana repica
insekticidi
hlorpirifos+bifentrin
deltametrin
% infestiranih biljaka
broj imaga
broj larva/biljka
Metadata
Prikaz svih podataka o dokumentuApstrakt
A global trend of intensive rapeseed production as a sustainable source of energy has
also been accepted in our region, but intensified production results have increased pest
populations in that crop. Central European countries with a long tradition of rapeseed production
have ample data on pest biology, control and effects of insecticide applications,
but such data are almost nonexistant under our regional conditions. In the light of this fact,
the objective of our study was to determine the optimal time for insecticide applications
for controlling pest species of the genus Ceuthorrynchus.
Trials were set up using standard OEPP methods with certain adaptations concerning
the pest species. The insecticides based on chlorpyrifos + bifenthrin, applied at the rates
of 0.5 l/ha and 0.75 l/ha, and deltamethrin at 0.3 l/ha, were applied a) once – at maximum
abundance of adults, and b) twice – first at maximum abundance, and then eight days
later. The trials were set up at two localities – Kać and Kovilj. Insecticide effects were evaluated
based on the number of adults per 20 plants, the number of damaged plants and the
number of larvae per plant.
After single application of the insecticides chlorpyrifos + bifenthrin (0.5 and 0.75 l/ha)
and deltamethrin (0.3 l/ha) in the locality of Kać, the percentage of infested plants was
1.25%, 36% and 75% (respectively), and 95% in untreated plots; while 75% and 22.5% of the
plants were infested in the locality of Kovilj after chlorpyrifos + bifenthrin application, 95%
after deltamethrin application, and 97.5% in untreated plots. Insecticide effect estimated
by the number of larvae/plant was 0 and 0.4 for chlorpyrifos + bifenthrin, 1.4 for deltamethrin
and 3.3 for untreated surface in the locality of Kać; while in the locality of Kovilj the
effect of chlorpyrifos + bifenthrin was 1.4 and 0.1, deltamethrin 3.9, and 5.2 larvae/plant in
untreated plots. After two insecticide applications in Kać, the percentage of infested plants
was 13.7% and 16.2% after chlorpyrifos + bifenthrin treatment, 62.5% after deltamethrin and
95% in untreated plots. In Kovilj, the percentage of infested plants was 22% and 17% after
the application of chlorpyrifos + bifenthrin, 79% after deltamethrin, and 97.5% on untreated
surface. The insecticide effect shown by the number of larvae/plant was 0.12 and 0.13
for chlorpyrifos + bifenthrin, 1.7 for deltamethrin and 3.3 on untreated surface in the locality of Kać. In Kovilj, the corresponding data were 0.16 and 0.08 for chlorpyrifos + bifenthrin,
1.4 for deltamethrin and 5.2 larvae/plant for the untreated surface. Praćenje svetskog trenda, to jest intenziviranje proizvodnje uljane repice kao obnovljivog
izvora energije, prihvaćeno je i u RS, međutim, intenzivnija proizvodnja povlači i povećanje
brojnosti populacija štetnih vrsta u ovom usevu. Zemlje srednje Evrope sa dužom tradicijom
u gajenju uljane repice raspolažu brojnim podacima o biologiji štetnih vrsta, suzbijanju
i posledicama primene insekticida, međutim, za naše proizvodne uslove takvih podataka
gotovo da i nema. Shodno tome, cilj rada je bio odrediti optimalno vreme primene insekticida
za suzbijanje vrsta iz roda Ceuthorrhynchus.
Ogledi su postavljeni prema standardnim OEPP metodama uz izvesnu adaptaciju, shodno
štetnim vrstama. Insekticidi na bazi hlorpirifosa + bifentrina u količini 0,5 i 0,75 l/ha i deltametrina
0,3 l/ha, primenjeni su: a) jednom – pri maksimalnoj brojnosti ulovljenih imaga;
b) dva puta – prvo pri maksimalnoj brojnosti imaga, a drugo posle osam dana od prvog.
Ogledi su postavljeni u dva lokaliteta, Kać i Kovilj. Ocene efekata insekticida su izvedene
preko: broja imaga/20 biljaka, broja oštećenih biljaka i broja larva/biljka.
Pri primeni insekticida hlorpirifosa + bifentrina (0,5 i 0,75 l/ha) i deltametrina jednom
u lokalitetu Kać, procenat napadnutih biljaka iznosio je 1,25%, 36% i 75% (respektivno), a u
kontroli 95%; a u lokalitetu Kovilj 75% i 22,5% posle primene hlorpirifosa + bifentrina, 95%
posle primene deltametrina, i u kontroli 97,5%. Efekat insekticida posmatran preko broja larva/
biljka za hlorpirifos + bifentrin iznosio je 0 i 0,4, za deltametrin 1,4, a u kontroli 3,3 u lokalitetu
Kać; a u lokalitetu Kovilj za hlorpirifos + bifentrin 1,4 i 0,1, za deltametrin 3,9, a u kontroli
5,2 larva/biljka. Primenom insekticida dva puta u lokalitetu Kać procent napadnutih biljaka
je iznosio 13,7% i 16,2% posle primene hlorpirifosa + bifentrina, 62,5% za deltametrin, a
u kontroli 95%. U lokalitetu Kovilj primenom hlorpirifosa + bifentrina, procenat napadnutih
biljaka je 22% i 17%, primenom deltametrina 79%, a u kontroli 97,5%. Efekat insekticida posmatran
preko broja larva/biljka za hlorpirifos + bifentrin iznosio je 0,12 i 0,13, za deltametrin
1,7, a u kontroli 3,3 u lokalitetu Kać; a u lokalitetu Kovilj za hlorpirifos + bifentrin 0,16 i 0,08, za
deltametrin 1,4, a u kontroli 5,2 larva/biljka.