نتایج جستجو برای: leaf spots

تعداد نتایج: 106027  

Journal: :African Journal of Agricultural Research 2017

2014
Ali Yaseen Ali

The weeping fig thrips Gynaikothrips uzeli Zimmermann (Thysanoptera: Phlaeothripidae) is newly recorded for the first time in the leaf galls of the weeping fig tree Ficus benjamina L. (Rosales: Moraceae) in the coastal area of Tartous, Syria. The thrips caused purplish red spots on the leaf surface of the host plant and the leaves curl. G. uzeili appears to be successfully adapted to this area.

Journal: :علوم گیاهان زراعی ایران 0
فواد فاتحی دانشجوی سابق دکتری،پردیس کشاورزی و منابع طبیعی دانشگاه تهران عبدالهادی حسین زاده دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران هوشنگ علیزاده استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران

a proteomic approach was conducted to further understand the mechanism of plant responses to salinity in hordeum bulbosom. three-week-old seedlings were treated with 300 mm of nacl for 21 days. total proteins of fourth leaf were extracted and separated by two-dimensional gel electrophoresis. more than 500 protein spots were reproducibly detected, including 46 spots that were up-regulated and 16...

2015
Kyung-Sook Han Jong-Han Park Chang-Gi Back Mi-Jeong Park

In 2006~2010, leaf spot symptoms, that is, small, yellow spots that turned into dark brown-to-black lesions surrounded by a yellow halo, were observed on Cymbidium spp. in Gongju, Taean, and Gapyeong in Korea. A Fusarium species was continuously isolated from symptomatic leaves; in pathogenicity testing, isolates caused leaf spot symptoms consisting of sunken, dark brown lesions similar to the ...

2015
Yeo Hong Yun Hyuk Woo Kwon Hong Seok Ahn Seong Hwan Kim

Farfugium japonicum is used in traditional medicine and as an edible herb in China and Korea. In July 2013, leaf spots were observed in F. japonicum seedlings at Ulleung Island, Gyeongsangbuk Province, Korea. Early symptoms on the leaf adaxial surface included roughly circular yellow spots that later developed brown, necrotic centers. The aecia were hypophyllous, cupulate, yellowish, 180~430 µm...

2016
Jung-In Wee Jong-Han Park Chang-Gi Back Young-Hyun You Taehyun Chang

In July 2015, diseased leaves of black chokeberry (Aronia melanocarpa) were observed in Danyang and Gochang, Korea. The symptoms appeared as circular or irregular brown leaf spots, from which Alternaria tenuissima was isolated. The isolates were cultured on potato dextrose agar, and their morphological characteristics were observed under a light microscope. The colonies were whitish to ash colo...

Journal: :چغندرقند 0
راحله رهام دانش آموخته کارشناسی ارشد زراعت دانشگاه لرستان ناصر اکبری استادیار دانشکده کشاورزی دانشگاه لرستان محمد عبداللهیان نوقابی دانشیار پژوهشی مؤسسه تحقیقات چغندرقند حمیدرضا عیسوند استادیار دانشکده کشاورزی دانشگاه لرستان محمد یعقوبی دانش آموخته کارشناسی ارشد زراعت دانشگاه لرستان

a field experiment was conducted to study the spatial relationships between weed seed bank and population and their distribution models in sugar beet crop (beta vulgaris) in 2009 at motahari  agricultural research station of karaj. sampling from seed bank before sugar beet drilling and weed population in three stages during the growing season were done using square (50*50 cm) and rectangle (25*...

2009
Baozhu Guo Xiaoping Chen Yanbin Hong Xuanqiang Liang Phat Dang Tim Brenneman Corley Holbrook Albert Culbreath

Peanut is vulnerable to a range of foliar diseases such as spotted wilt caused by Tomato spotted wilt virus (TSWV), early (Cercospora arachidicola) and late (Cercosporidium personatum) leaf spots, southern stem rot (Sclerotium rolfsii), and sclerotinia blight (Sclerotinia minor). In this study, we report the generation of 17,376 peanut expressed sequence tags (ESTs) from leaf tissues of a peanu...

2015
Sang Gon Kim Jin-Seok Lee Jung-Tae Kim Young Sang Kwon Dong-Won Bae Hwan Hee Bae Young Son Seong-Bum Baek Young-Up Kwon Mi-Ok Woo Seonghyu Shin

Understanding the response of a crop to water deficiency is the first step towards breeding drought-tolerant varieties. In this study, inbred maize (Zea mays L.) line KS140 was subjected to drought stress by withholding water for 10 days at the V5 or V6 leaf stage. Water-deficient plants experienced a decrease in relative leaf water content, stomatal conductance, net CO2 assimilation rate, and ...

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