Effect of Host Plants on The Reproductive Aspects of Cheilomenes sexmaculata (Fabricius) (Coleoptera: Coccinellidae)
Journal Title: Current Investigations in Agriculture and Current Research - Year 2018, Vol 3, Issue 5
Abstract
The feeding and reproductive potential of predators are greatly influenced by plants due to direct effect on prey quality. Aphis craccivora Koch (Hemiptera: Aphididae) is a sap sucking insect and one of the major pests on economically important crops in India. The lady beetle Cheilomenes sexmaculata is a very common predator of A. craccivora. Hence, the influence of four host plants belong to family Fabaceae viz., Phaseolus sinensis, Lablab purpureus, Vigna radiata and Vigna mungo on the reproductive aspects of C. sexmaculata on A. craccivora was investigated. The effect of these host plants was observed significant. The maximum period of preoviposition (4.66±0.33 days), oviposition (33.33±0.42 days) and post-oviposition (5.66±0.21 days) were observed on P. sinensis but its minimum period of pre-oviposition (3.66±0.21 days), oviposition (28.33±0.71 days) and post-oviposition (4.33±0.33 days) were recorded on V. mungo. Similarly, the maximum fecundity was observed on P. sinensis (510.8±0.16 eggs) followed by L. purpureus (485.0±3.77 eggs), V. radiata (411.9±5.03 eggs) and V. mungo (382.7±4.92 eggs). The high viability of eggs was also observed on P. sinensis (85.40%) and L. purpureus (81.13%). Thus, it is concluded that P. sinensis is more suitable host plant when preyed on A. craccivora and it can be used for mass rearing programme of C. sexmaculata due to its high reproductive capacityBiological control is considered as the backbone of Integrated Pest Management Programme and about 90% of all potential pests are already under Biological Control [1]. Biological Control is an important tool of Integrated Pest Management which is method of controlling pest population by using natural enemies. Biological agents are directly influenced by plants as they affect the prey quality [2]. Prey quality has a direct impact on the growth, development and reproduction of predatory insects. The suitability of prey species can be evaluated by measuring its effect on biological attributes of the predator [3,4]. Studies on chemical ecology of host plants selection by herbivores have been largely carried out to explain the diversity of secondary plant chemicals and host specialization of herbivores [5]. Allelochemicals and secondary metabolites of host plants can make prey less suitable and decrease fecundity [6], and long-term co-evolution between predators and prey can lead to the development of better adapted strategies for optimal use of a specific prey [7,8].
Authors and Affiliations
Rakhshan R, Equbal Ahmad
Keywords
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- EP ID EP571367
- DOI 10.32474/CIACR.2018.03.000175
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