Greenhouse whitefly infection on wild watermelon break resistance to the root-knot nematode.

摘要: Influence of foliar infection by the greenhouse whitefly (Trialeurodes vaporariorum) on resistance to Meloidogyne javanica in highly nematode-resistant wild watermelon (Cucumis africanus) was investigated under conditions. The 2 × 7 factorial experiment arranged a split-plot design, with main plots constituting presence (GHWF1) and absence (GHWF0) (GHWF), while subplots contained seven nematode inoculum levels. partitioned into 12 compartments 2.5 m2 each using GHWF-proof net. Nematode inoculation ca. 800 GHWF adults from tomato plants were introduced selected treatments day after transplanting. Fifty-six days treatments, had eliminated M. C. africanus seedlings as shown greater than one reproductive factor values, sex ratio that skewed towards femaleness, high number root galls reduced productivity test plant. Infection induced release honeydew copious quantities, which resulted sooty mould covering photosynthetic organs, resulting chlorophyll content imbalancing distribution non-structural carbohydrates osmotically active ions. Consequently, there is need manage population densities when are intended for use suppressing species.