نتایج جستجو برای: cypress tree mealybug
تعداد نتایج: 172040 فیلتر نتایج به سال:
Estimation of Water Storage Capacity on Branches of Japanese Cedar and Cypress by Modeling Tree Form
While monitoring the health of different ornamental and shade trees in Serbia, symptoms indicative cypress canker disease were observed young Cupressus sempervirens Belgrade urban area. Symptoms included tree mortality (specimens recorded with a change needle colour, branch decline or longitudinal bark cankers on stems resin exudates) appearance acervuli fruiting bodies cones. Using light micro...
Pseudococcus comstocki (Hemiptera: Pseudococcidae) is a mealybug species native to Eastern Asia and present as an invasive pest in northern Italy and southern France since the start of the century. It infests apple and pear trees, grapevines and some ornamental trees. Biocontrol programmes against this pest proved successful in central Asia and North America in the second half of the 20th centu...
Mango mealybug, an exotic pest of mango, was first observed in Benin in 1986. In a biological control programme, natural enemies were successfully released in the following years. The present study is the first attempt to measure the impact of the biological control of mango mealybug over a large area, through a survey of mango producers. Most producers attributed the observed improvement of ma...
A quartz crystal oscillator can be thought ofas a resonator connected across an amplifier considered asa nonlinear dipole the impedance of which depends on theamplitude of the current that flows through it. The non-linear amplifier resistance and reactance are obtained byusing a time domain electrical simulator like SPICE (Simu-lation Program with Integrated Circuit Emph...
the aim of this study is comparison of soil characteristics and biodiversity in plantation of bald cypress and caucasian alder forest stands in kludeh region (mazandaran province). in order to study biodiversity in forest stands and control region, 10 sample plots (releve) were selected and the name and abundance of plant species of the forest floor were recorded. biodiversity of herbal plants ...
Pest insects are a major constraint on fruit production in Senegal. In order to find an alternative the chemical control of these pests, insecticidal effect neem derivatives (Azadirachta indica) formulated at different doses mango mealybug (Rastrococcus invadens) was studied. The powders obtained from parts were mixed with distilled water proportions, namely for 100ml 0g (control), 1g, 2g, 4g, ...
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