Habitat manipulation for managing insect pests of Brinjal

Borkakati, Rudra N.; Saikia, D. K.; Venkatesh, M. R.

doi:10.5958/0974-8172.2019.00184.6

Cited by 8 publications

(9 citation statements)

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“…The other behavioural indicator -cumulative duration spent near the stimulus -could represent crickets choices made not only by smelling the feed. Theoretically, after the first contact with the stimuli and the tasting of it, gustatory discrimination and learning process could also be activated (Borkakati et al, 2019). In either theoretical case, E. coli contaminated feed has a repellent effect on Jamaican crickets.…”

Section: Discussionmentioning

confidence: 99%

Can crickets recognise bacterially contaminated feed? Gryllus assimilis odour perception of Escherichia coli

Aleknavičius

Markaitytė

Būdienė

et al. 2023

JIFF

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Edible crickets Acheta domesticus and Gryllus assimilis are worldwide mass-reared insects. They are recognised as a sustainable source of protein in the food and feed industries and, in relation to this, must comply with food safety requirements. In this study, we assessed the self-protective ability of crickets to recognise potentially hazardous bacteria-contaminated feed. A two-choice test was carried out to estimate the crickets’ preference between the bacteria-contaminated and control feed. Three bacterial species were tested as potential contaminants: Escherichia coli, Pseudomonas aeruginosa and Bacillus subtilis. A. domesticus did not recognise feed contaminated with any of the bacterial species tested. G. assimilis avoided E. coli-contaminated feed, while the other two bacteria did not cause differences in feeding behaviour. The study of gas chromatography-electroantennogram detection showed that E. coli released a volatile compound, which was olfactory perceived by both males and females of G. assimilis. The compound was identified as indole. In a behavioural test, crickets spent less time feeding on indole-contaminated feed compared to control feed. Hence, indole induced an avoidance response in G. assimilis. It can be concluded that G. assimilis perceives and recognises some bacteria contaminants and thereby avoids spoiled feed.

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Section: Discussionmentioning

confidence: 99%

Can crickets recognise bacterially contaminated feed? Gryllus assimilis odour perception of Escherichia coli

Aleknavičius

Markaitytė

Būdienė

et al. 2023

JIFF

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“…These coccinellids have been shown to be effective suppressants of aphids (Bista & Omkar., 2013; Isikber, 2005; Khan & Zaki, 2007; Razze et al, 2016; Sharma et al, 1991). Coccinellids have also been observed in high numbers when cabbage and squash were intercropped with cowpea (Borkakati et al, 2019; Lopez & Liburd, 2022). Through in situ counts and YST, we show that marigold and cowpea plots supported a higher density of parasitoids than the control for both years.…”

Section: Discussionmentioning

confidence: 99%

“…Cowpea ( Vigna unguiculata (L.) Walp. (Fabales: Fabaceae)) are used worldwide for their nitrogen‐fixing properties; however, the extrafloral nectaries (EFN) in cowpea have been shown to enhance the control of aphids and whiteflies by attracting natural enemies such as Orius tristicolor White (Hemiptera: Anthocoridae), Trichogramma (Hymenoptera: Trichogrammatidae) wasps, lady beetles and spiders (Borkakati et al, 2019; Kopittke et al, 2012; Letourneau, 1990; Wu et al, 2011). Extrafloral nectaries offer up to 70% more sugar than other floral nectars found in most flowers (Kuo & Pate., 1985).…”

Section: Introductionmentioning

confidence: 99%

Effects of intercropping marigold, cowpea and an insecticidal soap on whiteflies and aphids in organic squash

López

Liburd

2023

J Applied Entomology

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The silverleaf whitefly MEAM1 (Bemisia tabaci) Gennadius (Hemiptera: Aleyrodidae), the cowpea aphid (Aphis craccivora Koch), the green peach aphid (Myzus persicae Sulzer) and the melon aphid (Aphis gossypii Glover) Hemiptera: Aphididae are major insect pests of squash (Cucurbita pepo L.), causing significant yield losses of up to 80% in Florida. We hypothesized that intercropping African marigold (Tagetes erecta L.) and cowpea (Vigna unguiculata L. Walp.) with zucchini squash will encourage an abundance of beneficial arthropods and increase cultural and biological control against these key insect pests by significantly reducing their populations and consequently improve yields. In a 2‐year field experiment, five treatments were evaluated in a randomized complete block design consisting of four replicates. Three diversified cropping treatments were implemented: (1) intercropping squash with marigold, (2) intercropping squash with cowpea, (3) intercropping squash with marigold and cowpea (mixed). These treatments were compared with an organic grower standard insecticide, (4) M‐Pede (potassium salts of naturally derived fatty acids) sprayed on monocropped squash and (5) monocropped squash with no pest management (control). Results indicated that squash intercropped with marigolds accounted for the highest marketable yields. Squash intercropped with cowpea had marginally high yields but attracted the highest densities of aphids. M‐Pede did not increase squash yields, but reduced aphids, whiteflies and associated squash silverleaf (SSL) disorder ratings and showed no deleterious effect on populations of natural enemies. We conclude that a mixture of marigold and cowpea could be used to suppress pests by increasing beneficial arthropod diversity while enhancing marketable yields of organic squash. M‐Pede could be used as a last resort when experiencing high hemipteran pressure.

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“…The extracts of brinjal root and leaves can cure problems such as skin diseases, cough, toothache, piles, in ammation, throat problems, and stomach problems (Barik et al, 2020). Now-a-days brinjal yield is much satisfactory but its production is greatly hampered due to different insect-pest, they play a central role for lowering the yield of brinjal by attacking them from the nursery stage to harvesting (Borkakati, 2019). More than 70 number insect species attack the brinjal (Subbarathnam, 1982).…”

Section: Introductionmentioning

confidence: 99%

Morphological characterization and genetic diversity analysis of yield and yield contributing parameters in brinjal (Solanum melongena L.) genotypes

Zabbar,

Parveen,

Rahim

et al. 2023

Preprint

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A field experiment was carried out to assess the significance of variance, heritability, genetic advance, correlation, path coefficient and genetic diversity for fifteen yield and yield contributing features in twenty brinjal genotypes. The study was conducted at Sher-e-Bangla Agricultural University in Dhaka from November 2021 to June 2022 using a Randomized Complete Block Design (RCBD) with three replications. In this experiment, the existing genotypes showed significant differences for all characters. The phenotypic co-efficient of variation was higher than the genotypic co-efficient of variation for all the characters. Highest PCV (68.60) was found in percent of BSFB infestation and GCV (59.50) was found in percent of BSFB infestation. High heritability associated with high genetic advance and high genetic advance in percentage of mean was found in plant height, individual fruit weight and percent of BSFB infestation, which indicated selection on the basis of phenotype would be effective. Assessments of character association indicating that fruit yield per plant had highest significant positive correlation with days of last harvesting (rg = 0.495, rp = 0.454), number of secondary branches per plant (rg=0.356, rp=0.315), leaf blade length (rg = 0.714, rp = 0.462), leaf blade width (rg = 0.674, rp = 0.498) and number of fruits per plant (rg= 0.798, rp= 0.787) in both genotypic and phenotypic level. Path analysis revealed that the number of flowers per plant (1.421) had the maximum positive and direct effect on yield per plant. According to PCA, D2 and Cluster analysis, twenty brinjal genotypes were grouped into were grouped into five different clusters. Cluster I, II, III, IV and V composed of three, three, four, six and four genotypes respectively. The maximum intra cluster distance was exhibited by cluster III (1.918), whereas the highest value for inter cluster distance was recorded between cluster II and V (95.69). Mean performance of cluster revealed the highest number of fruits per plant (13.45) and yield per plant (0.71) value in cluster IV. Therefore, considering cluster distances, contribution of characters towards divergence, magnitude of cluster mean performance, genetic parameters and based on the objectives, the genotypes G10 (Choto Katali) and G20 (BARI Bt Begun 2) from cluster III, G11 (BARI Hybrid Begun 2) and G8 (BARI Begun 6) from cluster II, G5 (BARI Hybrid Begun 4) along with G18 (Local Black Long) from cluster IV might be used in future breeding program.

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Habitat manipulation for managing insect pests of Brinjal

Cited by 8 publications

References 0 publications

Can crickets recognise bacterially contaminated feed? Gryllus assimilis odour perception of Escherichia coli

Can crickets recognise bacterially contaminated feed? Gryllus assimilis odour perception of Escherichia coli

Effects of intercropping marigold, cowpea and an insecticidal soap on whiteflies and aphids in organic squash

Morphological characterization and genetic diversity analysis of yield and yield contributing parameters in brinjal (Solanum melongena L.) genotypes

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