Evaluation of the resistance of several tomato cultivars to Bemisia tabaci (Genn.) (Hem.: Aleyrodidae)
Subject Areas : Journal of plant ecophysiology
1 - گروه گیاهپزشکی، واحد جیرفت، دانشگاه آزاد اسلامی، جیرفت، ایران
Keywords: Resistance, Tomato, Bemisia tabaci,
Abstract :
Bemisia tabaci is one of the most important pests of crops and greenhouse products, which is of great importance due to the transmission of viral diseases. In this research, Non-free spawning preference, the length of the prepubertal growth period, and the mortality rate before the maturity of this pest on tomato cultivars including Rio Grand, Ergon, Early Urbana I, and Early Urbana II were investigated under greenhouse conditions. The experiments were designed in a completely randomized block design. The results showed that there is a significant difference at the level of five percent in terms of spawning. The lowest and highest number of eggs per unit of leaf area were observed in Early urbana II and Ergon cultivars, respectively. The results showed that the effect of the host cultivar on the length of the developmental and mortality period of the embryonic and pupal period is not significant, but it is significant on the length of the developmental and mortality period of the nymph period and prepubertal (egg to complete insect). The highest length of the growth period of nymph and prepubertal (egg to complete insect) was recorded on the Early urbana II cultivar and the lowest value of the above parameters was recorded on the Ergon cultivar. The highest losses of the nymph stage and prepubertal (egg to complete insect) were observed on the Early urbana II cultivar and the lowest value of these parameters was observed on the Ergon cultivar. Therefore, the Early urbana II cultivar is more unfavorable to B. tabaci than the other cultivars, and it is a desirable attitude to prioritize planting it in the pests management strategy to lessen the damage caused by the B. tabaci.