Onion thrips, Thrips tabaci Lindeman, are an economic pest of alliums worldwide. In Ontario onion-growing regions, seasonal abundance and population trends of onion thrips are not well known. The objectives of this research were to investigate onion thrips population dynamics by using both white sticky traps and plant counts, to gain insight into flight height, and to determine the genus and se...

The impact of water-soluble carbohydrate composition in relation to damage levels of onion thrips (Thrips tabaci Lindeman), were studied under field conditions at the Experimental Field of the Biotechnical Faculty in Ljubljana on 7 cabbage cultivar (Brassica oleracea L. var. capitata). Onion thrips showed weak preference on cabbage heads with high amount of total carbohydrate, fructose and gluc...

Populations of whiteflies [Bemisia tabaci (Gennadius) sl.] and the rates at which they were parasitized in cotton fields in Israel and California were monitored over a number of years. Studies took place both in fields that were treated with insecticides and in untreated fields and permitted us to assess the influence of insecticidal treatments upon percentage parasitism. The results showed tha...

Bensulfuron-methyl (BSM) is widely used in paddy soil for weed control. BSM residue in the soil has been known to inhibit the growth of sensitive crop plants. However, it is unknown whether BSM residue can affect the agrosystem in general. In this study, we have found significant effects of BSM on the infestation of Bemisia tabaci, Myzus persicae, and Tobacco mosaic virus (TMV) in Nicotiana tab...

Onion thrips (Thrips tabaci Lindeman (Thysanoptera: Thripidae)) can be a pest in organic onion production on Prince Edward Island. This study was to examine the effect of planting time and variety on infestation levels and damage by onion thrips on cabbage (Brassicae oleracea capitala (L.)). A field site was planted with 2 main and 8 lesser varieties of cabbage over 4 planting dates. Some varie...

Una de las principales plagas en el cultivo tomate (Solanum lycopersicum L.) es Bemisia tabaci (Genn.), la cual transmite virus fitopatógenos responsables daños fisiológicos severos y pérdidas rentabilidad del cultivo. La protección planta contra vectores virales primeras semanas después trasplante fundamental para asegurar producción. El experimento se realizó invernadero repitió dos veces, ut...

The whitefly (Bemisia tabaci Gennadius) is a notorious devastating sap-sucking insect pest that causes substantial crop damage and yield losses due to direct feeding by both nymphs adults also through transmission of viruses diseases. Although the foliar application synthetic pesticides crucial for efficient control B. tabaci, it has adverse effects such as environmental pollution, resistance r...

A study was conducted to evaluate efficiency of Mycotal at a concentration 1.2 x 107 spores / ml and Trichoderma harzianum concentrations 1.5 106 on nymphs adults the whitefly, Bemisia tabaci under field conditions eggplant, Solanum melongena. The results revealed that Mycotal, active substance is fungus Lecanicillium muscarium, showed highest average relative in killing treatment, which amount...