A Comparison between the Efficacy of the Combination of each of lufox and phosalone Insecticides with the Fungicide penconazole in the Simultaneous Control of Lobesia botrana Den. & Schiff. and Erysiphe necator Schwein.

Lobesia botrana Den. & Schiff. (Lepidoptera: Tortricidae), and Uncinula necator (Schw.) Burr. (Erysiphe necator ) are among the most important pests and pathogens in all vineyards in the world and in Iran. At present the most common method of control used is by chemical pesticides. In the present study, the efficacy of the combination of each insecticide lufox (Lufox ® EC 10.5%) (1.5 l/1000 L) and phosalone (Zolon ® EC 35%) (1.5 l/ha) separately with the fungicide penconazole (Topaz ® EW 20%) (125 ml/100 l water) after three times spraying on three generations of the pest L. botrana and the disease was investigated. Percentage of infected clusters and each single grape in a cluster were the factors evaluated. The present experiment was performed based on a randomized complete blocks design with 6 treatments (5 treatments and a control) with three replications. The results obtained show that combination of Lufox with Topaz treatment for L. botrana with an average infection of 1.15±0.34 of clusters in 520 clusters (0.29% infection in each cluster) was lower compared with the infection resulted when the combination of phosalone with Topaz was used with 4.89±0.66 cluster, in 411 clusters (1.19% infection in each cluster). In powdery mildew disease, combination of Lufox with Topaz showed an average infection of 0.32±0.06 cluster in 520 clusters (0.06% infection in each cluster),showed more effective control than the combination of Zolon with Topaz with an average infection of 0.59±0.06 cluster in 411 clusters (0.14% infection per cluster). According to the results, the mixture of Lufox insecticide with Topaz (penconazole) fungicide is recommended for the simultaneous control of L. botrana and E. necator in vineyards of the country which may also result in the optimum application of chemical pesticides and therefore safety of the environment.