INSECT PESTS OF COUNTRY BEAN AND THEIR RELATIONSHIPS WITH TEMPERATURE (original) (raw)
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ABUNDANCE AND FLUCTUATION PATTERNS OF INSECT PESTS IN COUNTRY BEAN
A field study was conducted to assess the population abundance and fluctuation pattern of major insect pests of country bean under natural condition. The research was done in the farm field of the Department of Entomology, Sylhet Agricultural University, during summer and winter seasons of 2017-2018. Five insect species were found, among them aphid (Aphis craccivora Koch), pod borer (Maruca testulalis G.) and epilachna beetle (Epilachna dodecastigma) were recorded in both seasons and shoot borer (Acrobasis caryae) and field cricket (Brachytrypes portentosus) were found in winter and summer season, respectively. The highest number of accumulated populations of aphid was 408.74 and 205.89, pod borer was 249.99 and 95.45 and epilacha beetle was 57.69 and 43.5 plot -1 in winter and summer season, respectively. The relative abundances of aphid were 55.58% and 59.24%; Pod borer was 33.92% and 27.46; Epilachna beetle was 7.76% and 12.42% in winter and summer country bean field, respectively. The major insect pest of bean aphid incidence varied among the vegetative, flowering and fruiting stages which were 120 and 85, 150 and 74 and 135 and 65 in winter and summer country bean plot -1 , respectively. Conversely, other major pest of country bean was pod borer mainly infesting flowering and fruiting stages and number was varied 15 and 13 and 235 and 85 in winter and summer, respectively plot -1 . Aphid and pod borer were found as major pests and field cricket, epilachna beetle and shoot borer were found as minor pest in country bean agroecosystem.
Population Dynamics of Major Insect Pests of Common Bean in Kashmir Valley
Indian Journal of Entomology
This study is on the bean aphid Aphis fabae Scopoli, whitefly Bemisia tabaci (Genn.), bean weevil Conapium sp. indet., flea beetle Altica himensis Shukla which are found associated as pests at different phenological stages of the common bean Phaseolus vulgaris L. Of these A. fabae, B. tabaci and Conapium sp. indet. were categorized as major pests as they caused significant damage. The incidence of these pests showed a peak on the 35th standard meteorological week (SMW) in all the three locations studied. The peak incidence at Bandipora was 11.80 ± 0.66, 3.10 ± 0.58 and 1.20 ± 0.08, respectively; at Baramulla, the peak was 10.40 ± 0.62, 3.40 ± 0.13 and 1.30 ± 0.07, respectively; and at Kupwara, it was varying as 12.60 ± 0.69, 3.40 ± 0.13 and 1.30 ± 0.07 for the three pests, respectively.
Seasonal dynamics of bean aphids and its relationship with the abundance of Lady Bird Beetles
2021
The seasonal dynamics of aphid Aphis craccivora Koch (Hemiptera: Aphididae) on four bean species namely country bean Lablab purpureus, yard long bean Vigna sesquipedalis, hyacinth bean Dolichos lablab and bush bean Phaseolus vulgaris were studied from September to December 2017 in the experimental field of the Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh. The study also investigated the relationship between the abundance of aphid and its predatory insect lady bird beetle. Aphid abundance on the bean species showed increasing trend from the 4th week of September and reached to the peak during the 2nd week of November and then declined. Bush bean and yard long bean, respectively depicted the higher and lower abundances of aphid throughout the study. Relationship between the abundance of aphid and lady bird beetle on the bean species were positively correlated. Aphid showed negatively correlation with temperature and rainfall,...
Journal of entomology and zoology studies, 2020
Studies on succession and incidence of pod borers on Indian bean, Lablab purpureus var. typicus (L.) Sweet were carried out to savvy the knowledge regarding influence of weather parameters on pest appearance. The spotted pod borer, Maruca vitrata (Geyer) and gram pod borer, Helicoverpa armigera (Hubner) were found to infest the crop with varying intensities during Kharif, 2019. The incidence of spotted pod borer and gram pod borer started in second week of August (33rd SMW). The peak population of spotted pod borer, M. vitrata (9.80 larvae/ five plants) was recorded in the second week of September (37th SMW), gram pod borer, H. armigera (7.90 larvae/ five plants) in the third week of September (38th SMW). The minimum temperature showed a positive significant correlation with population of both spotted pod borer and gram pod borer (r= 0.87 and 0.81 respectively). The other meteorological parameters, viz., maximum temperature, relative humidity and rainfall had non-significant correla...
Journal of entomology and zoology studies, 2013
Field experiment was conducted in the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during 2009 kharif season to evaluate the efficacy of insecticides for increasing yield of country bean by protecting pod damage by bean pod borers. The spray plots gave significantly higher yield than the control plots. Among the insecticides, Neem oil, Fenitrothion50 EC and Emamectin benzoate 5 SG performed best by reducing 59.46, 51.35 & 45.95 % infested pod production respectively. For marketable pod yield, Deltramethrin 2.5 EC, Fenotrothion 50 EC and Curtap 50 SP performed best by producing 5.78, 5.48 & 5.39 ton/hectate at the same time increasing 46.70, 38.58 & 36.80 % marketable pod yield over control respectively. Thus for gross yield, Deltramethrin 2.5 EC, Fenitrothion 50 EC & Cutap 50 SP performed best by producing 6.11, 5.65 & 5.61 ton/ha as well as increasing 41.76, 31.09 & 30.16 % gross pod production. Therefore, Deltramethrin 2.5 EC, Fe...
2012
Lablab purpureus L. (Sweet) is an important pulse-cum-vegetable crop in India, cultivated for tender pods, seeds and fodder. Govindan (1974) in Karnataka recorded as many as 55 species of insect pests and a species of mite. Among them, the pod borers were considered to be the most important and they appeared regularly causing crop loss to the tune of 80-100 per cent (Katagihallimath and Siddappaji, 1962). The pod borers of Dolichos bean include Helicoverpa armigera (Hubner), Adisura atkinsoni (Moore), Maruca testulalis (Geyer), Etiella zinckenella (Treitschke), Sphenarches caffer (Zeller), Exelastis atomosa (Walshinghan), Callosobruchus chinensis (Linnaeus) and Lampides boeticus (Linnaeus) (Chakravarthy, 1977; Mallikarjunappa, 1989). The present study was taken up to study the seasonal incidence and abundance of the pod borers in Dolichos bean.
Abundance of predators in country bean field during summer season
International Journal of Biosciences, 2012
The study was conducted at the experimental field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during March to June 2009 in order to know the abundance of biological control agents (predators) in country bean ecosystem. During the study period the predators, black ant (Formicidae), lady bird beetle (Coccinellidae), Stink bug (Pentatomidae), Damsel fly (Coenagrionidae) and spider was found considerably. At the vegetative stage black ant (Formicidae) was highly abundant followed by lady bird beetle and spider. At the reproductive stage lady bird beetle, black ant and pentatomid bug found abundantly.
Plant Physiology and Soil Chemistry
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. ...
Journal of Multidisciplinary Applied Natural Science
An experiment has been conducted to know the efficiency of some promising pyrethroids and bio-rational insecticides for controlling the major sucking pests of country beans under field conditions during the winter season September 2020 – March 2021. The different treatments were Cypermethrin 10 EC (T1), Lambda-Cyhalothrin 2.5 EC (T2), Emamectin benzoate 5 SG (T3), Abamectin 1.8 EC (T4), Spinosad 45 SC (T5), and untreated control (T6). The rate of leaf infestation at the lower, middle, and top stages of country bean ranged from 8.82–17.78, 13.89–36.39, and 13.72–33.33% in T5treated and untreated control plots, respectively. The rate of shoot infestation at the middle and top stages of country bean ranged from 18.67–34.33 and 17.00–39.27% in T5 treated and untreated control plots, individually. The lowest and highest inflorescence infestation of 29.15% and 46.67% was recorded in T5 treated and untreated control plots, separately.The lowest fruit infestation of 8.84% by number and 8.32...