Article

Weed Survey in Sweet Corn (Zea mays saccharata Sturt.) in Regency of Sumedang and Bandung Indonesia

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Abstract

Objective: The objective of this study was to investigate the dominant weed species on sweet corn in two sweet corn production centers in West Java (Sumedang and Bandung Regency). Methodology: The materials used in this experiment was weed that grows in sweet corn, basic map and quesioner. The instruments used in this experiment were the square meters (0.5×0.5 m), hoe, scale, plastic rope, plastic bags, a spade, electric scale, dryer oven and altimeter. The study was carried out in Sumedang Regency (District Pamulihan and Sukasari) and Bandung Regency (District Cileunyi and Arjasari), each Regency consisted of 12 sweet corn farms. The study was carried out from March, 2014 until July, 2014. The experimental design used was descriptive with survey method. Each district consisted of 6 sweet corn farms. There were 12 observations on each Regency, so the total observations were 24 observations. Results: The results of this study showed that based on Sum Dominance Ratio (SDR) analysis, the dominant weeds found in Sumedang Regency were Ageratum conyzoides and Eupatorium odoratum L. (broad leaves) and Cyperus rotundus (sedge), whereas the dominant weed species found in Bandung Regency only Ageratum conyzoides (broad leave). The comparison of coefficient communities value (C) between Regency of Sumedang and Bandung was of 69.75% which means that, the weed population in Bandung and Sumedang was different. The total value of species diversidty index (H') in districts Pamulihan, Sukasari, Arjasari and Cileunyi were 1.18, 1.12, 1.39 and 1.35 consecutively, which means a relatively low diversity category. Conclusion: The dominant weeds and weed population in Bandung Regency and Sumedang Regency were different. All weed population in all study areas have low diversity.

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... where n i = number of individuals of a species, N = total number of individuals of all species, p i = relative abundance of species (Equation 3) and H = Shannon diversity index (Equation 2) (Magurran 1988). According to Kurniadie et al. (2016) the value of H ranges from 0 to 7. A value of H < 1 means very low diversity; H = 0 means there is only one species present (Muoni et al. 2014), H = 1-2 means low diversity, H = 2-3 means moderately diverse, H = 3-4 falls in the higher diversity class, and H > 4 indicates high diversity. (Mandumbu et al. 2012). ...
... The species diversity indices obtained in the study were low. This is probably because of the low species richness and uneven distribution of weed species in the plots (Kurniadie et al. 2016). This may have been due to the failure of the different maize-cover crop rotations to effectively reduce the densities of individual weed species. ...
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This datasheet on Ageratum conyzoides covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.
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This datasheet on Cyperus rotundus covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.
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