Plant Physiology and Soil Chemistry (PPSC) 1(2) (2021) 63-69 Quick Response Code Access this article online Website: www.ppsc.org.my DOI: 10.26480/ppsc.02.2021.63.69 Cite The Article: Md. Omar Faruq, Md. Abdul Latif, Md. Mohasin Hussain Khan, G.P. Das (2021). Population Dynamics and Management of Bean Pod Borer (Maruca Vitrata Fabricius) on Yardlong Bean Cultivation in Chittagong Hill Tracts of Bangladesh. Plant Physiology and Soil Chemistry, 1(2): 63-69. ISSN: 2805-5063 (Online) CODEN: PPSCCU RESEARCH ARTICLE Plant Physiology and Soil Chemistry (PPSC) DOI: http://doi.org/10.26480/ppsc.02.2021.63.69 POPULATION DYNAMICS AND MANAGEMENT OF BEAN POD BORER (MARUCA VITRATA FABRICIUS) ON YARDLONG BEAN CULTIVATION IN CHITTAGONG HILL TRACTS OF BANGLADESH Md. Omar Faruq a *, Md. Abdul Latif b , Md. Mohasin Hussain Khan a and G.P. Das c a Department of Entomology, Patuakhali Science and Technology University, Dumki, Patuakhali-8602, Bangladesh. b Department of Entomology, Sher-e-Bangla Agricultural University, Sher-e-Bangla nagar, Dhaka 1207, Bangladesh. c Former Director (AIC), Bangladesh Agricultural Research Council, Dhaka-1215, Bangladesh. *Corresponding Author Email: ofaruq.cti@gmail.com This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ARTICLE DETAILS ABSTRACT Article History: Received 04 September 2021 Accepted 06 October 2021 Available online 03 November 2021 The research activity was conducted in major intensive yard long bean growing areas, such as Chittagong hill tracts regions of Bangladesh to know the population dynamics and to develop sustainable & eco-friendly management techniques for controlling major insect pests of yard long bean during 2016 and 2017 cropping season in the farmers’ fields at three hill districts of Chittagong. The study was carried out following randomized complete block design (RCBD) having seven treatment combinations. Each treatment turned into replicated three (03) times. Results found that bean pod borer infestation on yardlong bean commenced from 2nd week of May while pod formation commenced after which gradually increased with the age of crop. During this period environmental temperature was gradually increased but rainfall was decreased. Among the treatments, T3 reduced the highest infestation of bean pod by 90.07% in Bandarban, 89.29% in Rangamati and 89.80% in Khagrachari over control, respectively. The highest pod yield (17.64 tha-1 in Bandarban, 15.14 tha-1 in Rangamati and 15.93 tha-1 in Khagrachari, respectively) throughout the season were achieved by the same treatment. So, spraying of voliam flexi 300SC @ 0.5 ml Liter-1 water at 10 days interval+hand collection & destruction of infested fruits and larvae+nappy trap (T3) is going to be the foremost effective treatment to control bean pod borer in the three hill districts of Chittagong, Bangladesh. KEYWORDS population dynamics, management, nappy trap, hilly areas, yield 1. INTRODUCTION Yardlong bean can be a cultivated taxonomic category of the cowpea, conjointly called to as Chinese long bean or asparagus, or snake bean. Despite their common names, these pods are about half a meter long. Native to west Africa, it is a vigorous vine, it is a very nutritious vegetable that contains a large amount of digestible proteins both in the pods (23.5- 26.3%) and in the leaves (Ano and Ubochi, 2008). Bean production is 30,977 tons on an area of 2,772 ha with a productivity of 11 mt/ ha in Nepal, in Bangladesh, they have gradually increased in recent years (MoAD, 2012). Productivity is very low Dutta et al. one of the main restrictions on the production of yardlong beans in our county is the attack of insect pests (Anon, 2009). Among the insect pests, Euchrysops cnejus (F) is an insect pest, (Lepidoptera: Lycaenidae) which has been a serious pest in Bangladesh and other countries for many years (Ali, 2006). A serious disadvantage of growing lentils and cowpeas is the heavy infestation of various insect pests (Benchasri and Bairaman, 2010). A group researcher reportable that the key insects of the yardlong bean are pod borer (Maruca vitrata), aphid (Lipaphis erysimi), and the arthropod genus beetle (Epilachna 13 dodecastigma) (Mohiuddin et al., 2009). M. vitrata will take advantage of a minimum of 45 totally different host plant species in tropical Asia and geographical region (Malini et al., 2014). M. vitrata larvae produce webs on floral buds, flowers, and pods, and therefore internally feeding on these plant elements, initial arthropod larvae like flowers instead of pods or leaves. The mature larvae, particularly from the third instar, are capable of damaging pods (Srinivasan et al., 2015). Ulrichs and Mewis reportable that the intensive injury caused to the fruitful parts of legume crops, farmers apply pesticides indiscriminately against this pest (Ulrichs and Mewis, 2001). In Bangladesh, the country bean (Lablab purpureus) was sprayed at weekly or biweekly intervals-sometimes each day-to management M. vitrata (Hoque et al., 2002). The population dynamics of the major pod borers in red gram showed that the beginning of the spotted pod borer, M. vitrata started somewhat recently of October and arrived at a top in the second week of December (Chaitanya et al., 2012). The peak incidence of larvae during flowering and pod development has been observed in species of legumes (Mahalakshmi et al., 2016). Lepidoptera feeds on flowers and pods, which can cause severe losses of edible legumes, especially in tropical and subtropical regions (Rouf and Sardar, 2011). Maruca vitrata (testulalis) Geyer (Lepdoptera: Crambidae), a genetically complex species, due to its wide host range, high obliteration potential and worldwide distribution (Margam et al., 2011; Margam et al., 2011; Periasamy et al., 2015). Therefore, legume growers are faced with the challenge of M. vitrata, that uses completely different scientific discipline treatment methods, equivalent to the applying of typical pesticides which cause adverse effects to the atmosphere and human health, however fail to realize a satisfactory