Aphids and their host plants in Ayodhya (original) (raw)
Related papers
International Journal of Current Microbiology and Applied Sciences 9(5): 2529-2546 , 2020
The aphids (Homoptera: Aphididae) are major pests of agriculturally important crops, including vegetables, across the world. They suck plant sap, cause leaf curling, yellowing and stunted growth of the host plants. They also act as vectors of many viral diseases in plants. In order to explore aphid pests and their naturally occurring bio-control agents (parasitoids and predators), an extensive field survey was conducted in different vegetable ecosystems of the Kashmir valley during the years from 2014-2019. Moreover, a through literature survey pertaining to aphids, reported from Jammu and Kashmir, was also done. Accordingly, based on these studies, it was concluded that as many as 18 species of aphids belonging to 12 genera infest as many as 26 species and 30 varieties of vegetable crops in Jammu and Kashmir (J&K). It was also concluded that at least 29 species of insect predators and 17 species of parasitoids occur naturally to suppress these aphid pest species in vegetable ecosystems in J&K. In sum, through this study, a comprehensive account of aphids and their natural enemies with reference to vegetable crops in J&K is presented. This work will be useful for the studies concerning the devising of strategies for Integrated Control Program of aphids, especially through utilization of natural bio-control agents.
Interaction of selected wheat genotypes towards aphids and their natural enemies in Pothwar region
Journal of entomology and zoology studies, 2017
The present study was conducted to investigate the population distribution pattern of aphids and their natural enemies under the response of different wheat varieties at Research Farm of PMAS Arid Agriculture University, Rawalpindi during 2008. Data regarding to winged, wingless and nymph aphid population present on leaves, spike and stem of wheat varieties were recorded. The population of winged, wingless and nymph of aphids were maximum on INQALAB-91 variety with 3.00, 6.69 and 7.97 per leaf and minimum on GA-2000 variety with 2.667, 6.282 and 7.333 per leaf. The predators Coccinelid Beetle, Syrphid fly and Aphid Mummies abundance were maximum on INQALAB-91 variety with 2.154, 1.154 and 3.692. The winged, wingless and nymph aphids population on spikes of wheat were recorded minimum on GA-2000 variety and abundance of predators were maximum on INQALAB-91 variety. The winged, wingless and nymph aphids minimum population were observed on stem of wheat variety GA-2000 with 1.385, 7.56...
Diversity and abundance of family Aphididae from selected crops of Faisalabad, Pakistan
2013
Meaningful diversity measures are necessary to increase awareness on the issue of biodiversity. Specific study of various communities present within the agro-ecosystem is necessary for its management. Aphids act as one of the major pest of crops. Present study was conducted to determine the species diversity and abundance of aphids in cropland of Faisalabad for a period of one year. A total of nine species of aphids were recorded. Brevicoryne brassicae was one of abundant species 30% followed by Myzus persicae (28%) Schizaphis graminum (11%) Rhopalosiphum padi (10%) Rhopalosiphum maidis (9%) and Lipaphis erysimi (8%). Highest diversity of aphids was observed in winter with 65%. The impact of environmental factor on abundance and diversity was determined by canonical correspondence analysis. The presented data base will be helpful in ecological pest management strategies of aphids.
Effect of wheat cultivars on aphids and their predator
The current study was conducted to determine the influence of wheat cultivars on aphids and their coccinellid predator populations. Five cultivars of wheat (99T007, BK-2002, TW0135, INQLAB and CHAKWAL-97) were sown at Arid Zone Research Institute, Bhakkar during 2006. The INQLAB-91 appeared to be the most resistant cultivar, whereas 99T007 appeared to be the most susceptible one for aphid infestations. The 4th week of February was found to be very favourable for aphids in wheat fields in the study area. The highest and lowest populations of coccinellid predators (all species) were recorded on TW0135 and 99T007 cultivars, respectively. The highest population of coccinellid predators was recorded during the 3rd week of February. We observed a significant synchronization between aphids and coccinellids populations. It is concluded from the study that as INQLAB-91 is resistant to the attack of aphid’s population, this cultivar should be promoted in the areas of high aphid infestation. The populations of coccinellids follow the aphid’s population and coccinellids can be important biological control agents of aphids and can be imported tool for IPM programme in the study area.
The size of Aphis gossypii population in brinjal (Solanum melongena L.) crop field was assessed using a randomised complete block design in the Rabi crop season (2009-10) at Ghulam Muhammad Abad, Faisalabad, Punjab, Pakistan. The maximum aphid population was recorded in February. In this study we observed that aphid population started decreasing with time as the environmental temperature increased. Abiotic conditions played an important role and significantly affected the reduction in the number of aphids. Environmental variables, such as the maximum and minimum temperature, had significant negative effects, whereas relative humidity had a significant positive effect, precipitation had a non-significant negative effect on the Aphis gossypii population. Farming practices indicated that different plant protection strategies were adopted, which mainly involved the excessive application of pesticides. Given the frequency of aphids on brinjal crops and farming practices, there is a need to develop a crop protection package based on modern integrated pest management practices.
IAR Consortium, 2021
Cereal aphid species are becoming one of the significant pests of wheat under the vagaries of agro-climatic conditions of Bihar in the regime of global warming. No scientific study seems to exist on species complex of aphids affecting the wheat crop in the region. Present investigation aimed to resolve the prevailing species complex of the crop. The observations were recorded on eleven diverse wheat genotypes planted in randomized block design during 2012-13 and 2013-14 under unprotected field condition. Aphid population was found maximum during 1 st to 2 nd weeks of March when the crops were mostly between 58 to 69 Zadoks growth stages. The level of infestation varied from 5% to 100%. In most of the plants the aphids were mainly concentrating on the earhead. Among the wheat genotypes used for the investigation the ear heads were mainly infested by the mixed population of grain aphids i.e. Sitobion avenae (Fabricius) and S. miscanthi, dominated by S. avenae. The aphid intensity varied from less than 10 per tiller to more than 50 per tiller. Other two species which were present in relatively low proportion were Rhopalosiphum maidis and R. padi. R. maidis observed mainly on flag and few lower leaves whereas the R. padi was observed on leaves and ear heads often with few numbers. Aphid complex comprising of these four species was found in all the years of investigation with fluctuation in their relative proportions in which grain aphids were found most predominant.
Study on Species Richness of Aphid through Integrated Pest Management
Pakistan Journal of Agricultural Research, 2022
Yellow moericke and sticky traps are important tools of integrated pest management (IPM), which act as indicators of population trends and fluctuation of flying insects. These traps were evaluated at different growth stages of wheat (seedling, tillering and dough stage) and trap height (0.5, 1.0 and 1.5 meter) on the basis of mean aphid collection and species richness. Results indicated that population appeared in the standard week (SW) 52 of 1 st year to SW 18 of 2 nd year in both traps. Population peaks in the yellow moericke traps (YMT) and sticky trap (YST) were found during SW 08-14 and SW 10-14, respectively. The YMTs were 50 % more effective due to their higher attraction and killing rate of aphids as compared to the YSTs. The efficiency of attraction depends upon the size, shape, and height of trap, as well as the abiotic factors affecting them. To achieve ideal trap efficacy their height should be adjusted according to the crop growth stage. It is very important to keep traps just above the crop canopy. Traps at 0.5, 1.0 and 1.5 meter heights were more effective at seedling, tillering and dough stages, respectively. The population in the traps was correlated with the average temperature (⁰С) and humidity (%). Temperature had positive and significant correlation with population captured in the traps while humidity had negative and non-significant correlation with per unit population attraction. There was no significant difference of correlation between the traps attraction and years. Temperature and humidity had 47 and 0.9, 53 and 13 % impact on per unit population change in the YMT during 2019 and 2020, respectively. While in YST temperature and humidity had 55 and 0.7, 83 and 5 % impact on per unit population change during 2019 and 2020, respectively. These traps were installed in the wheat field where it attracted 14 species of aphid. Two new species Aphis nerii and Aphis fabae were reported in the agro ecological zone of Bhakkar having active periods SW 18-22 and SW 03-07, respectively. Yellow moericke traps are highly recommended to use as indicator as well as control tool of all important aphid species of wheat crop.
2020
The present investigation entitled “Aphid diversity and associated predatory fauna in different crop-ecosystems of Akola” was carried out during the year 2017-2018. During study period total 1810 specimens of aphids and 205 specimens of predatory fauna associated with aphids collected from various Kharif and Rabi crops agro-ecosystem. Pictorial key was developed during the course of investigation based on morphological characters facilitates to identify the aphid fauna from different crop-ecosystems up to species level. The aphids, Aphis gossypii (Glover) was found in three crops viz. Cotton, Okra and Sunflower. Aphis craccivora species was found on Cowpea, Bean and Citrus crops. The results of this study indicate that both Aphis gossypii (Glover) and Aphis craccivora have a wide range of host and vertical distribution from low to high. Hysteroneura setariae species of aphids were first time recorded for this locality. Pictorial key developed during the investigations based on morph...
Screening of different wheat varieties against aphids at Pantnagar
Journal of entomology and zoology studies, 2018
Study was carried out in the department of entomology, GBPUA & T, Pantnagar (2015-16). Lowest aphid population were found in PBW-660 (1.9 aphids/plant) and highest aphid population was found in UP-2785 (4.96 aphids/plant) during 30 DAG. In the genotypes UP-2526 (8.86 aphids/plant) and DPW62150 (26.46 aphids/plant) recorded lowest and highest aphid population at 45DAG respectively. At 60 DAG UP-2785 and UP-2785 genotypes recorded the lowest (1.50 aphids/plant) and highest (4.96 aphids/plant) aphid population was recorded respectively. The genotype UP-2526 and UP-2869 were comparatively resistant with minimum population of aphids (4.30/plant and 5.83/plant). Whereas, the genotypes DPW-62150 (11.98 aphids/ plant) found susceptible. As the genotype UP-2869 and UP-2526, has lowest aphid population shows the highest yield of 21.00q/ha. DPW-62150, UP-2425, HD-3059, WH-1105 and UP-2883 with highest aphid population (11.98, 10.93, 10.72, 10.06 and10.02 aphids/plant) shows the lowest yield of...