بررسی اولیه تعیین بهترین زمان جهت سم پاشی سوسک شاخدار خرما

Dates are one of the most important products of Kerman province. Several pests damage date palm, including Oryctes elegans Prell (1914). This pest was first reported by Gharib (1348) from different regions of Iran.Larvae and complete insects of this pest feed on the leaves, young inflorescence, trunk and even the meristem in crown part of the tree and cause the leaves, spikes to break and even cause the death of the tree. In order to investigate the best spraying time (crown dusting) using Control 2 (insecticide: cypermethrin), an experiment has designed in Fahraj region since 2015 - 2017 for three years. The experiment was carried out in the form of a randomized complete block design with 3 treatments and 5 replications (10 palm individuals per replication) on 25-30-year-old Mozafati cultivars (trunk length between 3 and 4 meters). In this study, three Group in 50, include: control, spraying before flowering in February, and spraying after the appearance of spots (female flowers) were selected. The time of appearance of flowers (spot) is from the end of February to the beginning of May. The efficacy of insecticide was observed by counting the number of infected spike (with damage effects on the axis of the spike tail). the results showed that there is a significant difference between the treatment and the control. Control date palm suffered the most damage that did not receive any treatment. The statistical percentage of damage was as follows: 50% of control trees with damage between 1 to 5 infected spots, 20 to 30% of trees treated with insecticide at the same time as spike appeared, each palm had between 1 and 3 infected spikes. The lowest level of contamination was related to plants treated with insecticide before the appearance of spots. These trees showed less than 10% damage and spike that appeared at the end of the season were actually damaged. consequently, this treatment before the appearance of spots (spike) causes better control of the date palm stalk fruit borer.