scholarly journals Insect Pests Of Soybean (Glycine Max L.), Their Nature Of Damage And Succession With The Crop Stages

2013 ◽  
Vol 39 (1) ◽  
pp. 1-8 ◽  
Author(s):  
GC Biswas
Keyword(s):  
Insect Pests ◽  
Growth Stages ◽  
Minor Importance ◽  
Pest Species ◽  
Common Cutworm ◽  
Leaf Roller ◽  
Pod Borer ◽  
Glycine Max L ◽  
Ophiomyia Phaseoli ◽  
Different Growth Stages

Thirty nine species of insect pests were found to infest soybean crop at their different growth stages in Noakhali region of Bangladesh during January to May, 2010 and 2011. Among the recorded pest species, six species namely, hairy caterpillar, Spilarctia obliqua (Walker); leaf roller, Lamprosema indicata F; common cutworm, Spodoptera litura F; pod borer, Helicoverpa armigera (Hubner); stem fly, Ophiomyia phaseoli (Tryon) and white fly; Bemisia tabaci Genn. were considered as the major pests while the rests were of minor importance on the basis of population densities per plant, nature and extent of damages, and yield reductions. Most of the major and minor pests appeared in the crop during vegetative to flowering stages (30-50 Days after sowing) and the maximum insect population and their infestation occurred during flowering and pod formation stages of the crop throughout the study period. J. Asiat. Soc. Bangladesh, Sci. 39(1): 1-8, June 2013 DOI: http://dx.doi.org/10.3329/jasbs.v39i1.16027

scholarly journals Insect pests of groundnut (Arachis hypogaea L.), nature of damage and succession with the crop stages

2014 ◽  
Vol 39 (2) ◽  
pp. 273-282 ◽  
Author(s):  
GC Biswas
Keyword(s):  
Insect Pests ◽  
Leaf Miner ◽  
Growth Stages ◽  
Minor Importance ◽  
Pest Species ◽  
Common Cutworm ◽  
Leaf Roller ◽  
Arachis Hypogaea L ◽  
Extent Of Damage ◽  
Different Growth Stages

Thirty six species of insect pests were found to infest the different growth stages of groundnut crop at Gazipur, Bangladesh during the rabi seasons of 2008-09 and 2009-010. Among the recorded pest species, the hairy caterpillar, Spilarctia obliqua ( Walker); common cutworm, Spodoptera litura F.; jassid, Empoasca terminalis Distant ; leaf miner, Stomopteryx nerteria M. and leaf roller, Anersia ephippias (Meyr.) were considered as the major pests, while the rests were of minor importance on the basis of their population densities/plant, nature and extent of damage and yield reductions. Most of the major and minor pests infested during the vegetative to pre-maturity stages (45-95 DAS) and the maximum infestation occurred during pod formation and pod filling stages (50- 80 DAS) of the crop in both the years. DOI: http://dx.doi.org/10.3329/bjar.v39i2.20429 Bangladesh J. Agril. Res. 39(2): 273-282, June 2014

scholarly journals Insect Pests of Yard Long Bean (Vigna unguiculata subsp. sesquipedalis L.) in Major Growing Areas of Bangladesh

2014 ◽  
Vol 11 (2) ◽  
pp. 66-73 ◽  
Author(s):  
MS Uddin ◽  
MM Rahman ◽  
MZ Alam ◽  
A Awal ◽  
MA Mazed
Keyword(s):  
Data Collection ◽  
Field Data ◽  
Insect Pests ◽  
Leaf Beetle ◽  
Leaf Miner ◽  
Growth Stages ◽  
Pod Borer ◽  
Field Data Collection ◽  
Pest Incidence ◽  
Different Growth Stages

The survey was conducted in intensive yard long bean growing areas such as Jessore, Dhaka, Narsingdi, Comilla and Chittagong of Bangladesh to know the pest incidence and their level of infestation on yard long bean during March to October 2009. The study comprised of 75 sample farmers through intensive field visit for field data collection and inspection. Pest complex of yard long bean and their intensity of incidence were more or less similar in five surveyed areas and there were at least nine out of ten insect pests at different growth stages in each sample area, which were aphid, pod borer, thrips, red mite, leaf miner, leaf beetle, green sting-bug, jute hairy caterpillar, hooded hopper and semilooperin descending order. It was revealed that aphid and pod borer were the major insect pests in the study areas. They were found to severely infest in yard long beans. Semilooper caused minor damage which occurred only in Jessore, Chandina and Mirshawrai sample areas. DOI: http://dx.doi.org/10.3329/agric.v11i2.17489 The Agriculturists 2013; 11(2) 66-73

Yield loss at the different growth stages in soybean due to insect pests in Ghana

2012 ◽  
Vol 45 (15) ◽  
pp. 1796-1809 ◽  
Author(s):  
Mumuni Abudulai ◽  
Abdulai B. Salifu ◽  
Danial Opare-Atakora ◽  
Mohammed Haruna ◽  
Nicholas N. Denwar ◽  
...  
Keyword(s):  
Yield Loss ◽  
Insect Pests ◽  
Growth Stages ◽  
Different Growth Stages

Morphological and Physiological Performance of Indian Soybean [Glycine max (L.) Merrill] Genotypes in Respect to Drought 

2021 ◽  
Author(s):  
Nishi Mishra ◽  
M.K. Tripathi ◽  
Sushma Tiwari ◽  
Niraj Tripathi ◽  
Neha Gupta ◽  
...  
Keyword(s):  
Glycine Max ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Metabolic Activity ◽  
Growth Stages ◽  
Drought Tolerant ◽  
Soybean Genotypes ◽  
Physiological Analysis ◽  
Glycine Max L ◽  
Different Growth Stages

Background: Soybean is a key crop that grants an imperative supply of oils and proteins to humans and animals; however, its productivity spectacularly diminished owing to the occurrence of drought stress. Methods: The present investigation was executed during Kharif 2018-2019 to recognize drought tolerant genotypes on the basis of an array of morpho-physiological traits. Morpho-physiological analysis among 53 genotypes divulged the existence of drought tolerance capability in studied genotypes.Result: On the basis of current findings, it can be concluded that drought stress retards the growth and metabolic activity of soybean genotypes. These parameters showed considerable amount of variability under drought stress at different growth stages in soybean. Among 53 soybean genotypes, four genotypes viz., JS97-52, AMS 2014-1, RVS-14 and NRC-147 was found to be drought tolerant.

scholarly journals Alfalfa (Medicago sativaL.) shoot saponins: identification and bio-activity by the assessment of aphid feeding

2010 ◽  
Vol 105 (1) ◽  
pp. 62-70 ◽  
Author(s):  
H. Mazahery-Laghab ◽  
B. Yazdi-Samadi ◽  
M. Bagheri ◽  
A. R. Bagheri
Keyword(s):  
Plant Development ◽  
Insect Pests ◽  
Biological Effects ◽  
Biological Role ◽  
Growth Stages ◽  
Oral Toxicity ◽  
Medicagenic Acid ◽  
Significant Difference ◽  
Different Growth Stages

Biochemical components in alfalfa (Medicago sativaL.), such as saponins, can act as protecting factors against bio-stresses. Saponins are also antifeedants and show oral toxicity towards higher and lower animals. Changes in saponins, such as variation in the carbon skeleton, or hydrolysis of saponin glycosides and other conjugates, may change their biological effects. The aims of this research were to study saponin variation in different growth stages of alfalfa and to investigate the biological role of saponins in the spotted alfalfa aphid,Therioaphis maculata. Saponins from alfalfa shoots in different growth stages were extracted, chemically purified and analysed by TLC. Specific saponins such as soyasaponin1 from root and shoot and two bisdesmosides of medicagenic acid, one from shoot and another from root tissues, were identified using reference compounds allowing changes in saponin composition during plant development in different shoot tissues of alfalfa to be assessed. The response of the alfalfa aphid to feeding on alfalfa in different growth stages was studied. No significant difference in the survival of aphids, from neonate to adult, was observed, but due to the antibiotic effects of saponins, two differences were found in the onset of nymph production and cumulative nymph production. The results show that the saponin composition in alfalfa changes with plant development and this, in turn, can often negatively affect the development of specific insect pests such as the spotted alfalfa aphid, suggesting a possible biological role of alfalfa saponins.

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