Browsing by Author "Tepe, I."

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Critical Period of Weed Competition in Spring Lentil (Lens Culinaris) Under Un-Irrigated Rainfed Conditions
(indian Counc Agricultural Res, 2008) Erman, M.; Tepe, I.; Bukun, B.; Yergin, R.; Taskesen, M.
Effect of Different Control Methods on Weeds, Yield Components and Nodulation in the Spring Lentil
(TUBITAK, 2004) Tepe, I.; Erman, M.; Yazlik, A.; Levent, R.; Ipek, K.
This study was conducted on the lentil cultivar Malazgirt 89 during 1999 and 2000 to determine the most appropriate method for controlling weeds. In the experiments, hand hoeing, trifluralin, imazethapyr, linuron, prometryn, phenmedipham + desmediphame, trifluralin + hand hoeing and linuron + hand hoeing which should be used as an alternative to hand weeding, were tested. The effects of herbicides on nodulation in lentils were also investigated. Centaurea depressa in the first year, and Ranunculus arvensis and Acroptilon repens in the second year were the dominant weed species encountered in the plots. A combination of linuron + hand hoeing, linuron alone and hand hoeing were the most effective methods for weed control. Trifluralin, imazethapyr and phenmedipham + desmedipham showed phytotoxic effects on lentils. None of the herbicides and methods used in the investigation had any adverse effects on nodulation, and Rhizobium leguminosarum inoculation was not found to have any effect on the competitive ability of weeds in lentils. © TÜBITAK.
New Record in Summer Squash and Infestation of Branched Broomrape (Phelipanche Ramosa (L.) Pomel) in Vegetable Areas in Van/Türkiye
(Centenary University, 2024) Yergin Özkan, R.; Tepe, I.; Fidan, E.
The increasing vegetable production in Van/Türkiye province and its districts, where the study was carried out. The most significant of these issues is the parasitic and highly invasive broomrapes. A survey was conducted in August-October 2019 in order to determine the extent of the broomrape problem in the areas of vegetables. In this study, the type of broomrape found in vegetable areas was identified first, then the infestation rates and the average number of shoots in each plant were determined. The results concluded that the branched broomrape [Phelipanche ramosa (L.) Pomel] was found as a single species in all areas. It was also detected that branched broomrape was infested with tomato, eggplant, cucumber, and summer squash; with related densities of 4.2, 0.4, 0.26, and 0.78 %, on average, respectively. No infestation was encountered in pepper. As a result of the study, this infestation detected in summer squash is the first record in terms of the host series of branched broomrape. Although less infestation was seen in other areas, it is predicted that the branched broomrape could be spread rapidly to non-infested areas over time due to its character. © 2024, Centenary University. All rights reserved.
Nitrogen Levels and Application Methods Affect Weed Biomass, Yield and Yield Components in 'tir Wheat (Triticum Aestivum)
(Rsnz Publishing, 2009) Togay, N.; Tepe, I.; Togay, Y.; Cig, F.
Nitrogen (N)fertilisation is an important component of integrated weed management systems in wheat (Triticum aestivum). This study was conducted to determine the effects of N and application methods on the weed-crop competition in 'Tir' winter wheat (T. aestivum var. leucospermum) in the absence of herbicide. The trial was conducted in a factorial randomised complete block design with 4 replications in 2 years (2005-06 and 2006-07). Three N rates (0, 60, and 120 kg N ha(-1)) and three application methods ((I) broadcast on the soil surface; (2) banded 10 cm broadcast between every crop row; and (3) banded 10 cm deep between every crop row) were applied. Weed flora composition and density, weed biomass, grain yield, biological yield, plant height, spike length, number of seeds per spike, 1000 seed weight, and protein ratio in grain and shoot were investigated. The differences between treatments for weed density were not significant in either year. However, application of N up to 120 kg ha-1 increased total weed biomass to 1020 and 2009 kg ha(-1) in the 2 respective years, whereas weed biomass of 643 and 862 kg ha(-1) was obtained with 0 N ha(-1). Greatest weed biomass was recorded with N applied by broadcast and banded between crop rows, whereas weed biomass was least for N banded 10 cm deep with values of 722 and 1139 kg ha(-1) in 2 successive years. Highest grain yields were obtained with 120 kg ha(-1) N (1568 and 1190 kg ha(-1)) and for N banded 10 cm deep (1263 and 1132 kg ha(-1)) in the 2 successive years, respectively. Information gained from this study will be used to develop more efficient fertilisation levels and application methods in winter wheat as components of integrated weed management in the absence of herbicide.
Studies on Effects of Russian Knapweed (Acroptilon Repens (L.) Dc) and Butter Cup (Ranunculus Damascenus Boiss and Gaill), Causing Problem in Winter Wheat, on Yield and Determination of Their Economical Thresholds in Van
(TUBITAK, 1999) Kaya, I.; Tepe, I.
In this study, effects of different densities of Russian knapweed (Acroptilon repens (L.) DC) and butter cup (Ranunculus damascenus Boiss and Gaill) on yield and yield components of winter wheat were researched in Van. It was determinated that, increasing densities of A. repens have decreased number of spike, grain, straw and total yield of wheat. But, increasing densities of R. damascenus have not been effective on yield and yield components because of being small constitution and having short growing period. Ten plants per m2 of A. repens reduced grain and straw yields respectively 24.3 and 19%. These amounts are over economical threshold, therefore weed cotrol must be done. When the densities were 60 plants/m2, loss of grain yield was about 50% and loss of straw yield was about 40%.
Weeds in Pomegranate Orchards in Gaziantep Province, Turkey
(Centenary University, 2016) Muslu, T.; Tepe, I.
This study was carried out in order to determine the weed species in pomegranate This study was carried out in order to determine the weed species in pomegranate (Punica granatum L.) orchards in the province of Gaziantep, Turkey. The samples were taken from the pomegranate cultivation areas in six districts of Gaziantep province (Nizip, Oğuzeli, Islahiye, Karkamış, Şahinbey, and Nurdağı) at two different times in 2012, considering the vegetation periods of the plants. Density, biomass and frequency of occurrence of the weeds were determined. At the end of the study were found out 35 weed species from 22 different families. It was found that 34 and 31 weed species were found in the first and second sampling periods in Gaziantep province respectively. In the first sampling period the average number of weeds were 31 per square meter with a biomass of 8.6 grams on average whereas it were 33 per square meter with a biomass of 11.6 grams on average in the second sampling period. The districts with the highest weed density were Nizip (33.6 weeds m-2) in the first, and Oğuzeli (38.9 weeds m-2) in the second sampling period. The most remarkable weeds, in terms of average density and occurrence per square meter, are as follows in order pigweeds (Amaranthus spp.), common purslane (Portulaca oleracea L.), Johnson grass (Sorghum halapense (L.) Pers.), green foxtail (Setaria viridis (L.) P. Beauv.), field bindweed (Convolvulus arvensis L.), common cocklebur (Xanthium strumarium L.), lamb’s quarters (Chenopodium album L.), wild carrot (Daucus carota L.) and common morning glory (Ipomoea purpurea L. Roth.). As a result, the density of the weeds in pomegranate orchards is high in the region and the necessary actions should be taken for controlling with these weed species. © 2016, Centenary University. All rights reserved.