Journal of Research in Weed Science

1. Efficacy and selectivity of pendimethalin for weed control in sugar beet (Beta vulgaris L.), Gezira state, Sudan

Ahmed M. Yagoob; Mohamed S. A. Zaroug; Awadallah B. Belal Dafaallah

Volume 4, Issue 1 , Winter 2021, , Pages 16-28

http://dx.doi.org/10.26655/JRWEEDSCI.2021.1.2

Abstract

Sugar beet (Beta vulgaris L.) is considered as the second most important crop in the world after sugar cane in sugar production. Weed competition is considered as one of the major constrains ... Read More

2. Variability and Host Specificity of Striga hermonthica (Del.) Benth. in Response to in-situ Root Exudates of Sorghum bicolor (L.) Moench

Awadallah B. Dafaallah

Volume 3, Issue 2 , Spring 2020, , Pages 238-253

http://dx.doi.org/10.26655/JRWEEDSCI.2020.2.10

Abstract

Striga hermonthica (Del.) Benth., Orobanchaceae, is an obligate root parasite on important cereal crops. The aim of this study is to investigate variability and host specificity in ... Read More Striga hermonthica (Del.) Benth., Orobanchaceae, is an obligate root parasite on important cereal crops. The aim of this study is to investigate variability and host specificity in the early developmental stages of S. hermonthica parasitism in response to in-situ root exudates of sorghum. Field surveys were conducted during the seasons 2013/14 in Striga endemic areas in Sudan to collect seeds from the parasite. Fifteen S. hermonthica populations were collected. An in vivo experiment was conducted at the University of Gezira, Sudan to study the effects of in-situ root exudates of three sorghum cultivars on percentage of seed germination, haustorium initiation, attachment and penetration. Treatments were arranged in a factorial completely randomized design with three replicates. Data were subjected to the analysis of variance (P £ 0.5). The results revealed the highest percentage of seed germination (46.9-57.5 %), haustorium initiation (73.8-77.9 %), attachment (38.4–40 %) and penetration (20.7–23.7 %) into sorghum root was induced by in-situ root exudates of sorghum cv. Abu-70 and by sorghum cv. Wad Ahmed. While, the lowest percentage of seed germination (53.5 %), haustorium initiation (45.2 %), attachment (5.8 %) and penetration (1.5 %) into sorghum root was induced by in-situ root exudates of Hakika. The results also revealed that percentage of seed germination, haustorium initiation, attachment and penetration of S. hermonthica populations collected from infected sorghum in response to sorghum in-situ root exudates was the highest. While, the percentage of seed germination, haustorium initiation, attachment and penetration of S. hermonthica populations collected from infected millet in response to sorghum in-situ root exudates was the lowest. This study confirms the existence of two levels of physiological specialization in S. hermonthica populations in Sudan. Moreover, two strains of S. hermonthica are one specific to sorghum and the other to millet.

Journal of Research in Weed Science

Articles in Press

Current Issue

Volume 4 (2021)

Volume 3 (2020)

Volume 2 (2019)

Volume 1 (2018)

Author = Awadallah B. Dafaallah
Number of Articles: 2

1. Efficacy and selectivity of pendimethalin for weed control in sugar beet (Beta vulgaris L.), Gezira state, Sudan

Abstract

2. Variability and Host Specificity of Striga hermonthica (Del.) Benth. in Response to in-situ Root Exudates of Sorghum bicolor (L.) Moench

Abstract

Articles in Press

Current Issue

Volume 4 (2021)

Volume 3 (2020)

Volume 2 (2019)

Volume 1 (2018)

Author = Awadallah B. Dafaallah Number of Articles: 2

1. Efficacy and selectivity of pendimethalin for weed control in sugar beet (Beta vulgaris L.), Gezira state, Sudan

Abstract

2. Variability and Host Specificity of Striga hermonthica (Del.) Benth. in Response to in-situ Root Exudates of Sorghum bicolor (L.) Moench

Abstract

Author = Awadallah B. Dafaallah
Number of Articles: 2