uring seasons 2010/2011, leaf base rot, black scorch and inflorescences rot diseases have been observed on date palm trees and offshoot in nurseries and orchards of El-Kharga, Paris, El-Dakhla and El-Farafrah Oases in New Valley Governorate. Disease infection and severity (%) on date palm (var. Saidy) in the surveyed districts were found to be different. Several fungal species belonging to different genera were isolated from diseased samples collected from the surveyed districts. Frequency of the isolated fungi was different according to locality. Pathogenicity tests indicated that Botryodiplodia theobromae was the causal of leaf base rot disease and Thielaviopsis paradoxa was the causal of black scorch and inflorescences rot diseases. Saidy was the highly susceptible variety to leaf base rot followed by var. Higazi which also was the highly susceptible one to black scorch and inflorescences rot diseases, followed by var. Saidy. Meanwhile, var. Tamr was the least susceptible one to all tested diseases. Efficiency of six different fungicides for controlling the diseases in the orchards was tested. Topsin M 70 , Rizolex-T, Score, Kemazed and Ridomil Gold Plus caused the highest reduction in incidence of leaf base rot, black scorch and inflorescences rot diseases.

our phytopathogenic fungi, i.e. Alternaria alternata, Lasiodiplodia theobromae, Fusarium semitectum and Pestalotia psidii, were isolated from the dropped guava fruits collected from different orchards located at Beheira Governorate during 2013 and 2014 growing seasons. Disease incidence recorded higher percentages during 2013 than that of 2014 season. Pathogenicity of the isolated fungi was carried out on apparently healthy guava fruits, attached to its branches, collected from 15-year-old trees. Data show that maximum disease intensity was occurred on either petioles and/or fruits inoculated with mixture of fungal pathogens. These results indict that guava fruit drop might be a fungal disease complex when caused by certain phytopathogenic fungi. Four fungicides, i.e. Kemazed, Homai, Vacomil plus and Topas, were in vitro evaluated for their efficacies against the isolated pathogenic fungi. Moreover, the efficacy of four compounds, i.e. hydrogen peroxide, potassium sorbate, potassium bicarbonate and calcium chelate, was in vitro evaluated as alternative control means against the growth of tested pathogenic fungi. In this concern, hydrogen peroxide and potassium bicarbonate recorded the highest performance against the tested fungi. Under natural field infection, chemical control trails cleared that the efficiency of Homai 80% WP and Kemazed 50% WP reached 69.0 and 78.8%, respectively, as compared to the check treatment. It is worth to note that the concerned disease could be controlled by applying either of Homai 80% or Kemazed 50% at the rate of 70 g/100 l water.