Life history traits and population growth of greenhouse whitefly (Trialeurodes vaporariorum westwood) on different tomato genotypes

Abstract

The effects of five tomato genotypes (cv. Narvik and hybrids NS-6, Tamaris, Alliance and Marko) on the survival, reproduction, development and population growth of the greenhouse whitefly Trialeurodes vaporariorum were examined. A laboratory population of T. vaporariorum had been reared on tobacco plants for three years before the study. Females that laid eggs on the genotype Marko lived significantly longer and their offspring needed significantly shorter periods to develop than females on the genotype Narvik. The highest gross and net fecundity rates were found in females on the genotype Marko (36.74 eggs/ female and 27.93 eggs/female, respectively) and they differed significantly from the corresponding rates of females living on the genotype NS-6 (18.55 eggs/female and 15.33 eggs/ female), who had the lowest fecundity rates. The highest gross and net fertility rates were also found in females on the genotype Marko (31.24 adults/female and 23.73 adults/female), and they were significantly higher than those of females living on NS-6 (14.85 adults/female and 12.53 adults/female). Besides, net fertility rate of the females living on the genotype Narvik (13.80 adults/female) was also significantly lower than the rate of females on Marko. The instantaneous rates of increase showed no significant difference over a 10-day interval following the start of oviposition, while the increase rate was significantly higher on the genotype Marko after 12, 14 and 16 days, compared to the genotype NS-6. Eighteen, 20 and 22 days after the beginning of oviposition, the instantaneous rate of increase on the genotype Marko was significantly higher than it was on NS-6 and Narvik. Our data provide a basis for further research aiming to improve programs of integrated management of greenhouse whitefly.

Ispitivan je uticaj pet genotipova paradajza (sorta Narvik, hibridi NS-6, Tamaris, Alliance i Marko) na preživljavanje, reprodukciju, razviće i rast populacije bele leptiraste vaši Trialeurodes vaporariorum Westwood. Laboratorijska populacija T. vaporariorum gajena je na duvanu tri godine pre postavljanja ogleda. Ženke koje su polagale jaja na genotipu Marko živele su značajno duže, a razviće njihovog potomstva trajalo je značajno kraće, u poređenju sa ženkama na genotipu Narvik. Najviše stope bruto fekunditeta i neto fekunditeta zabeležene su kod ženki na genotipu Marko (36,74 jaja/ženki i 27,93 jaja/ženki) i one su se značajno razlikovale od odgovarajućih vrednosti kod ženki na genotipu NS-6 (18,55 jaja/ženki i 15,33 jaja/ženki), gde su zabeležene najniže stope fekunditeta. Najveće vrednosti bruto i neto fertiliteta takođe su imale ženke na genotipu Marko (31,24 jedinki/ženki i 23,73 jedinki/ ženki), i ove vrednosti su bile značajno veće u poređenju sa ženkama na genotipu NS-6 (14,85 jedinki/ženki i 12,53 jedinki/ženki). Pored toga, i stopa neto fertiliteta ženki na genotipu Narvik (13,80 jedinki/ženki) bila je značajno niža u poređenju sa stopom neto-fertiliteta ženki na genotipu Marko. Vrednosti trenutne stope rasta nisu se značajno razlikovale za interval 10 dana od početka ovipozicije, dok je za intervale od 12, 14, i 16 dana trenutna stopa rasta na genotipu Marko bila značajno viša u odnosu na genotip NS-6. U intervalima 18, 20 i 22 dana od početka ovipozicije, trenutna stopa rasta na genotipu Marko bila je značajno viša u odnosu na genotipove NS-6 i Narvik. Dobijeni rezultati predstavljaju polaznu osnovu za dalja istraživanja u okviru unapređivanja programa integralnog upravljanja štetnom vrstom T. vaporariorum.