scholarly journals Seasonal abundance of major sucking and chewing insects of guava

2019 ◽  
Vol 47 (1) ◽  
pp. 97-105
Author(s):  
Md Ruhul Amin ◽  
Shubhati Khisa ◽  
Habibur Rahman ◽  
Rayhanur Jannat ◽  
Muhammad Badruzzaman
Keyword(s):  
Relative Humidity ◽  
Fruit Fly ◽  
Scale Insect ◽  
Psidium Guajava ◽  
Scale Insects ◽  
Seasonal Abundance ◽  
Effect Of Temperature ◽  
Chewing Insects ◽  
Mealy Bug ◽  
Peak Abundance

Seasonal abundances of the sucking insects, namely mealy bug, white fly and scale insects, and chewing insect viz., fruit fly was monitored during September, 2016 to June, 2017 in a guava Psidium guajava orchard. Sucking insect was monitored by weekly observation on the leaves and chewing insect was captured using methyl eugenol trap. The mealy bug, white fly and scale insects were abundant during 4th week of November to 4th week of January and they showed fluctuations in their population. The mealy bug, white fly and scale insects had peak abundance in the 1st week of January, 4th week of November and 1st week of December, respectively. The scale insect revealed significantly higher abundance compared to other sucking insects. Two species of fruit fly, namely Bactrocera tryoni and B. dorsalis were found in the guava orchard and B. tryoni showed significantly higher abundance compared to B. dorsalis both in winter and summer seasons. In winter, B. tryoni reached the peak abundance in the 2nd week of January and their peak abundance in summer occurred in the 1st week of May. The daily mean temperature and relative humidity influenced the abundance of the sucking and chewing insects. Temperature individually contributed 30.0, 59.6, 59.3% abundance and temperature with relative humidity had 34.8, 60.9 and 73.5% abundance on mealy bug, white fly and scale insect, respectively. The effect of temperature on the abundance of fruit fly in winter and summer were 42.6 and 50.3%, respectively and the combined effect of temperature with relative humidity were 68.7% in winter and 61.9% in summer. Bangladesh J. Zool. 47(1): 97-105, 2019

scholarly journals Activity Monitoring of Olive Fruit Fly, Bactrocera oleae (Rossi) Males, and Effect of Temperature and Relative Humidity, at Al Quneitra Governorate, Southern Syria

2021 ◽  
Vol 39 (2) ◽  
pp. 116-125
Author(s):  
Nesreen Diab ◽  
◽  
Ibrahim Al-Jouri ◽  
Mohamad Dawoud ◽  
Ammar Jalloud ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Fruit Fly ◽  
Bactrocera Oleae ◽  
Seasonal Abundance ◽  
Effect Of Temperature ◽  
Activity Period ◽  
Olive Fruit Fly ◽  
Pheromone Traps ◽  
Olive Fruit ◽  
Significant Difference

This study was carried out in Al Quneitra governorate, Syria during 2017 and 2018 seasons with the aim of monitoring the activity of olive fruit fly Bactrocera oleae (Rossi) (Diptera: Tephritidae) males, in three locations of similar altitude (945-989 m above sea level), in addition to evaluating the effect of temperature and relative humidity on males activity using pheromone traps. The results obtained showed that olive fruit fly male adults activity began in the last week of May 2017 season and in the 3rd week of May 2018 season. Male adult's population reached a peak in the 4 th week of September, with an average of 126.43±33.70 males/trap in 2017 season, whereas their peak in 2018 season wasreached in mid-September with an average of 205.2±15.51 males/trap. Number of activity periods for males differed according to the season of study, and number of activity periods was 3 in 2017 and 4 in 2018. The duration of the activity period ranged from 4 to 11 weeks. The results obtained also showed a weak correlation effect of temperature and relative humidity on males activity during the two seasons, and its value was +0.16, +0.048, respectively. The monthly abundance of males differed during one season. Statistical analysis showed that the highest monthly abundance in 2017 season was in October, with an average of 192.07±14.94 males/trap with a significant difference in relation to the rest of the months, whereas in 2018 season it reached the highest monthly abundance in September, with an average of 420.33±15.18 males/trap, which significantly outperformed the rest of the months. Seasonal abundance of 2018 was significantly higher than in 2017. Keywords: Olive fruit fly, Bactrocera oleae, males’ activity, pheromone traps, temperature, relative humidity, Al Quneitra

scholarly journals Seasonal Abundance and Infestation of Fruit Fly on Cucumber

2021 ◽  
Vol 18 (2) ◽  
pp. 233-241
Author(s):  
S Nahid ◽  
MR Amin ◽  
MM Haque ◽  
SJ Suh
Keyword(s):  
Relative Humidity ◽  
Light Intensity ◽  
Meteorological Factors ◽  
Fruit Fly ◽  
Methyl Eugenol ◽  
Seasonal Abundance ◽  
Bactrocera Cucurbitae ◽  
Larval Population ◽  
Weather Parameters ◽  
Positive Light

Population dynamics and infestation of fruit fly, Bactrocera cucurbitae Coquillett (Diptera: Tephritidae) was monitored on cucumber, Cucumis sativus using methyl eugenol trap during summer and autumn in 2017 at Gazipur, Bangladesh. Relationship between the abundance of fruit fly and meteorological factors was also studied. The fruit fly showed significantly higher abundance in summer compared to autumn. The larval population per fruit was found higher in summer (24.9 fruit-1) than that in autumn (1.5 fruit-1). The daily mean temperature had significant positive, light intensity had insignificant positive, relative humidity had insignificant negative and rainfall had insignificant negative correlation with fruit fly abundance. The temperature, light intensity, relative humidity and rainfall individually contributed to fruit fly abundance of 14.1 %, 24.0 %, 0.8 % and 1.8 %, respectively. The combined effect of the weather parameters on fruit fly abundance was 40.7 % and the equations were insignificant. The fruit fly showed significantly lower level of infestation in methyl eugenol treated plots as compared to controls in both summer and autumn. SAARC J. Agri., 18(2): 233-241 (2020)

Occurrence and Pest Severity of Whitefly on Different Varieties of Chili

2021 ◽  
Vol 24 (1) ◽  
pp. 127-135
Author(s):  
M Nasrin ◽  
MR Amin ◽  
MRU Miah ◽  
AM Akanda ◽  
GM Miah
Keyword(s):  
Relative Humidity ◽  
Virus Infection ◽  
Meteorological Parameters ◽  
Seasonal Abundance ◽  
Maximum Temperature ◽  
Abundance Distribution ◽  
Flowering Stage ◽  
Capsicum Spp ◽  
Major Pest ◽  
Peak Abundance

Seasonal abundance, distribution and pest severity of white fly, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) were studied on the chili (Capsicum spp.) varieties namely BARI Morich 1, BARI Morich 2, BARI Morich 3, BINA Morich 1 and Bogura Morich during November 2017 to June 2018 at Gazipur in Bangladesh. Results showed that the white fly started to build up their population from 2nd week of February on the chili varieties and exerted the peak abundance at the last week of February when the plants were at flowering stage. Abundances of white fly positively correlated with maximum temperature and relative humidity, and negatively correlated with minimum temperature and rainfall. Meteorological parameters predicted 11.6 to 32.9% abundance of whitefly on the chili varieties. Occurrence of white fly on different strata of the varieties was statistically low on BARI Morich 2 compared to other varieties. Virus infection levels among the varieties differed significantly and BARI Morich 2 showed the lowest level of infection. BARI Morich 2, Bogura Morich and BARI Morich 1 revealed low level of leaf curl indices (6.8 to 9.3%) and these varieties could be selected for cultivation in the areas where whitefly is a major pest of chili. Ann. Bangladesh Agric. (2020) 24(1) : 127-135

scholarly journals Impacts of temperature, relative humidity and total number of fruits on cucurbit fruit fly infestations under field condition

2015 ◽  
Vol 26 (1) ◽  
pp. 1-5 ◽  
Author(s):  
MM Rahman ◽  
T Sultana ◽  
MM Uddin ◽  
M Shahjahan
Keyword(s):  
Relative Humidity ◽  
Field Condition ◽  
Natural Variation ◽  
Negative Relationship ◽  
Fruit Fly ◽  
Bitter Gourd ◽  
Effect Of Temperature ◽  
Positive Role ◽  
Field Laboratory ◽  
Positive Effect

The research was carried out in the field laboratory of the Department of Entomology, Bangladesh Agricultural University during April to July 2013 to correlate the temperature, relative humidity and number of fruits with the level of fruit infestations by cucurbit fruit fly, Bactrocerea cucubitae. Three cucurbitaceous vegetables namely bitter gourd (BARI Karola-1), ridge gourd (BARI Jhinga-1), and snake gourd (Local Chichinga) were taken as host crops. Percent fruit infestations were compared with the natural variation of temperature, relative humidity and number of fruits under field condition. Fruit infestations varied significantly with the variation of temperature, relative humidity and total number of fruits among three selected vegetables. Increasing of temperature had profound positive role in bitter gourd fruit infestation whereas negative relationship was found for ridge gourd infestation. However, statistically insignificant but positive effect of temperature was observed in snake gourd infestation. Fruit infestation of ridge gourd and snake gourd increased with the increase of relative humidity while negative relationship was observed in case of bitter gourd. Percent fruit infestations by cucurbit fruit fly were also found to be affected by total number of fruits. Positive but weak relationships were found between percent fruit infestations and total number of fruits of all three vegetables used in the experiments.Progressive Agriculture 26:1-5, 2015

Guava (Psidium guajava L.) Fruit Coating with Gum – Arabic for Quality and Fruit Fly Control

1970 ◽  
pp. 01-04
Author(s):  
Esameldin B. M. Kabbashi, Ghada H. Abdelrahman and Nawal A. Abdlerahman
Keyword(s):  
Shelf Life ◽  
Gum Arabic ◽  
Fruit Fly ◽  
Psidium Guajava ◽  
Postharvest Quality ◽  
Guava Fruit ◽  
Fruit Shelf Life ◽  
Fly Control ◽  
And Control ◽  
Subtropical Fruit

Guava (Psidium guajava L.) is a lovely tropical and subtropical fruit that originates in Mexico, Central America, and then taken to other distant and near parts around the world. In Sudan this popular fruit is produced in orchards and household and is so profitable but yet attacked by a lot of fruit fly species of the Genera Ceratitis and Bactrocera and the result is a loss of more than 70%. This research aimed at evaluating the effect of Gum Arabic coating (GAC) in extending the shelf life of guava fruit and disinfesting it from these notorious pests. Guava fruits from Kadaro orchards, Khartoum North, were tested using seven concentrations of Gum Arabic solutions. The results reflect that 1: 4 (25%) and 1: 8 (12.5%) (GA: water) concentrations attained 56 and 40% disinfestation, respectively whereas the other lower concentrations effected corresponding results in a range from 20 – 08%. The reduction in maggots per test fruit reached upto 188% as compared to the control.  The highest concentrations (1: 4 & 1: 8) effected a sustainability of 52% in fruit firmness (FF) with an average of medium (3) FF compared to soft FF (4) in the control. The corresponding results in other lower concentrations (1: 16; 1: 32; 1: 64; 1: 72 & 1: 96) were 36, 24, 24, 20 and 16%, respectively. In addition to an average FF of 4 (soft) for all these concentrations and 5 (very soft) for all the corresponding controls. Nevertheless, the sustainability of fruit color (FC) effected by the test concentrations was 52, 44, 24, 22, 24, 20, and 24%, respectively. Regarding these results, the two highest test concentrations effected a sizeable disinfestation and control of fruit flies and a good extension of shelf life of guava in Khartoum State. These findings support using this treatment as an effective IPM tool to extend guava fruit shelf life and upgrading its postharvest quality.

Towards the identification of the scale insects (Hemiptera: Coccomorpha) of continental Africa: 1. Identification of the families

Zootaxa ◽  
2021 ◽  
Vol 5052 (2) ◽  
pp. 1-40
Author(s):  
GILLIAN W. WATSON ◽  
DAVID OUVRARD
Keyword(s):  
Scale Insect ◽  
Economic Importance ◽  
Scale Insects ◽  
Insect Fauna ◽  
Adult Females ◽  
Plant Parasites ◽  
Plant Sap

Scale insects (Hemiptera: Sternorrhyncha: Coccomorpha) are obligate plant parasites feeding on plant sap; some are damaging pests in agriculture, horticulture and forestry. Despite their economic importance, the scale insects found in continental Africa have not been extensively studied and the keys for identifying them are incomplete and scattered through the literature in several languages. The aim of this study is to improve our understanding of the African scale insect fauna. As a first step towards their identification, we provide a key to the 23 families currently known from continental Africa, based on slide-mounted adult females, covering Aclerdidae, Asterolecaniidae, Cerococcidae, Coccidae, Conchaspididae, Dactylopiidae, Diaspididae, Eriococcidae, Halimococcidae, Kermesidae, Kerriidae, Kuwaniidae, Lecanodiaspididae, Margarodidae, Matsucoccidae, Micrococcidae, Monophlebidae, Ortheziidae, Phoenicococcidae, Pseudococcidae, Putoidae, Rhizoecidae and Stictococcidae.  

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