Abstract
Yard long bean (<em>Vigna sesquipedalis</em> L. Fruw) is one of the most popular vegetables in many countries of Southeast Asia. Especially in Thailand, it has given high productivities for export in both fresh and frozen types. Yard long bean is considered as relatively low pod yield productivity and stability because it is quite sensitive to unfavorably environmental conditions, particularly for humid tropical regions with turmoil weather. The effect of varieties on growth and yield of yard long bean was conducted at Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai campus, Thailand to test for yield and other horticultural characteristics of seven varieties of yard long bean. All varieties of yard long bean were well grown under Songkhla’s conditions. Randomized complete block design (RCBD) was used with four replications. The experiment was taken from February to April, 2014. The results showed that the Mae Ping, Euro, Green Arrow, Kheow Dok, and Saifa varieties exhibited good growth and high yield. The Mae Ping variety gave the highest marketable yield of 12.25 t<sup>.</sup>ha<sup>-1</sup> not significantly different (p≤0.05) from the Euro, Green Arrow, Kheow Dok, and Saifa varieties which gave the marketable yield of 15.16, 14.13, 13.51, and 13.34 t<sup>.</sup>ha<sup>-1</sup>, respectively. The Negro and Taiwan varieties were the second high yielding varieties which gave the marketable yield of 11.90 and 11.92 t<sup>.</sup>ha<sup>-1</sup>, respectively. The Euro, Kheow Dok, Saifa, and Taiwan were interesting varieties because they had pod length longer than 60 cm to meet the needs of the consumers in Songkhla province and around this area. It is concluded that the Mae Ping, Euro, Green Arrow, Kheow Dok, and Saifa varieties were the most suitable for growing under Songkhla conditions, southern Thailand due to its high growth and yield.
Highlights
Yard long bean is one of the important leguminous vegetables
Yard long bean originally found in West Africa, it has later been cultivated extensively in many countries in Southeast Asia, such as Malaysia, Philippines, Indonesia, and Thailand (Benchasri et al, 2011; Benchasri et al, 2012)
Seven commercial varieties of yard long bean namely Kheow Dok, Euro, Negro, Green Arrow, Mae Ping, Saifa, and Taiwan varieties were used in this experiment
Summary
Other members of the family include common bean, lima bean, garden bean, and southern bean (Decoteau, 2000) It is known as vegetable cowpea, asparagus bean, string bean, snake bean, snake pea, snap pea, and so on (Fana et al, 2004; Sarutayophat et al, 2007). Two growth habit types exist well in forms of dwarf and climbing The latter takes longer time to commence its pod production, but less determinate and more common as a commercial crop. Yard long bean is rich in protein, calcium, iron, riboflavin, phosphorus, potassium, and vitamin A. It is a very good source of vitamin C, folate, magnesium, and manganese (Asian Vegetable Research Development Center (AVRDC), 2015; Yamaguchi, 1983; Huqus et al, 2012)
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