S u m m a r yThe diversity of solitary bees varies depending on the vegetation, nesting habitats, and nesting fragmentation. The agriculture development in the Suez Canal region is receiving a great deal of attention in Egypt, thus, the diversity of solitary bees are essential for high quality production of seeds, vegetables, and fruit. The objective of this study was to evaluate the biodiversity of solitary bee populations around the Canal region. About 900 -1000 specimens of bees were collected from different locations of the Ismailia, Suez, and Sinai Governorates. Fifty-five species of bees were identified. With the exception of Melittidae family, all the bee families were present in the Canal region. The total number of species for each family were 7, 9, 11, 13, and 15 species for Andrenidae, Colletidae, Apidae, Halictidae, and Megachilidae, respectively. Lasioglossum mandibularie (Mo r a w i t z , 1866) is a newly recorded species collected from Egypt. In the Suez Canal region, the most abundant species found with large populations were Andrena ovatula ssp. ovatula (Kirby, 1802), Ceratina tarsata Morawitz, 1872, and Colletes lacunatus Dours, 1872.
Pollinators Visiting Sesame (Sesamum Indicum L.) Seed Crop with Reference to Foraging Activity of Some Bee Species A study was conducted to determine the insect pollinator orders visiting sesame, fluctuation percent of Hymenopterous fauna during flowering period, foraging activity of the pollinating insects belonging to Hymenoptera, Coleoptera, Lepidoptera and Diptera orders and foraging activity of Apis mellifera, Anthidium sp. and Xylocopa sp. from July 15 to September 4, 2011 at four time periods i.e., 9-11 am, 11-1 pm, 1-3 pm and 3-5 pm. Results revealed that insect percentage of Hymenoptera order was high followed by Lepidoptera, Diptera and Coleoptera. The highest activity of Hymenopterous fauna was in fourth week of flowering period and decreased gradually in the last weeks. Total number of pollinators was highest at 9-11 am followed by that at 11-1 pm, 1-3 pm and 3-5 pm. Among the bees, the number of Apis mellifera was the maximum followed by Xylocopa sp. and lastly Anthidium sp. at all time periods. It was also evident that temperature, wind and relative humidity also affect the percentage of insects visiting sesame flowers.
ABSTRACT.A survey of insect pollinators associated with sesame, Sesamun indicum L. (Pedaliaceae), was conducted at the Agriculture Research Farm, Faculty of Agriculture, University of Suez Canal during the growing seasons of 2011 and 2012. All different insect pollinators which found on the experimental site were collected for identification. Sampling was done once a week and three times a day. Three methods were used to collect and identify insects from the sesame plants (a sweep net, pitfall traps, digital camera and eye observation). A total of 29 insect species were collected and properly identified during the survey. Insect pollinators which recorded on the plants were divided into four groups, 18 belonged to Hymenoptera, seven to Diptera, three to Lepidoptera and one to Coleoptera. Results revealed that honey-bee, Apis mellifera, was the most dominant species in the 2011 season and the second one in the 2012 season. Whereas small carpenter bees, Ceratina tarsata was the most dominant species in the 2012 season and the second one in the 2011 season. The percentage of Hymenoptera was higher in the two studied seasons by 90.94% and 89.59%, followed by Diptera by 3.93% and 5.38%, then Lepidoptera by 3.58% and 3.62, and in the last Coleoptera by 1.53% and 1.39%, respectively.
SUmmARyWheat (Triticum sativum L.) is one of the most important cereal crops in Egypt. Insect pests, such as aphids, are major threats in terms of yield reduction. Induced resistance in wheat using salicylic acid as a foliar application was tested on the farm of the Faculty of Agriculture, Suez Canal University during 2012/2013 and 2013/2014 seasons. Three wheat cultivars, Gemeza 9, Sakha 93 and Giza 168, were sprayed three times with two concentrations of salicylic acid (SA), 200 mg/l and 100 mg/l, after early detection of aphid infestation by infrared thermal imaging.The infrared thermal imaging technique is based on significant differences in surface temperature between infested and healthy leaves. Imaging data are digital, and a computer program can be used to detect infestation rapidly. The results showed that aphid infestation raised the temperature of infested leaves, compared to healthy leaves. The range temperature difference between maximum and minimum temperatures (At) was 1.1 ºC in healthy leaves and 3.9 ºC in infected leaves. The results of SA application showed significant differences in the mean number of aphids and in reduction of infestation among treatments and cultivars. The higher of the two SA rates (200 mg/l) gave higher efficacy in the three cultivars than the lower rate (100 mg/l) over the five weeks of trial. The highest efficacy against aphids was reached one week after application (86.28% for Giza, 85.89% for Gemesa and 70.54% for Sakha). Moreover, SA treatment enhanced the wheat yield of all three cultivars, compared with control plants. The three cultivars (Giza, Gemesa and Sakha) produced higher yields than the control when sprayed with 200 mg/l SA. Their grain yield was 2,491.5, 2,455.0, and 2,327.25 kg/feddan (1 fed = 0.42 ha), respectively. In conclusion, infrared thermal imaging can be employed in identification of infected leaves. Also, the application of SA on wheat induced plant resistance to aphids.
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