نتایج جستجو برای: ulmi is more pathogenicity than o ulmi
تعداد نتایج: 8295779 فیلتر نتایج به سال:
The effect of neonicotinyl insecticides on integrated mite control in Washington apple was examined from 0 In a series of 20 field trials (54 treatments) designed primarily to look at efficacy against the codling moth, Cydia pomonella, nearly half of the treatments using four or more applications of acetamiprid had peak mite densities exceeding the economic threshold of 5 mites per leaf. Overal...
study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
—Field inoculation trials are an important component of screening American elms (Ulmus americana) for levels of resistance to Dutch elm disease. A major concern in screening is variability in disease ratings from year to year. Previous studies have demonstrated that timing of inoculation can have a significant impact on disease susceptibility. In this study, trees were inoculated in the main st...
Gülnar (Mersin)’da elma ağaçlarında bulunan zararlı ve yararlı Arthropoda türlerini saptamaya yönelik olarak yapılan bu çalışma 2014-2015 yıllarında ilkbahar, yaz sonbahar periyotlarında sürdürülmüştür. Çalışma sonucunda, 26 13 tür tespit edilmiştir. En önemli türlerin; Panonychus ulmi (Koch, 1836), Aphis pomi DeGeer, 1773, Eriosoma lanigerum (Hausmann, 1802), Tropinota hirta (Poda, 1761) Cydia...
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