A. gossypii populations exhibit host plant specialization within a narrow range of host selection. However, host specialization in other insect herbivore species was alterable (Singer, Thomas & Parmesan, 1993; Messina, Mendenhall & Jones, 2009; Wu et al., 2013). BK However, in this study, we also found that an artificial diet lacking secondary metabolites not only changed performance of aphids, but also induced host range expansion of these aphids. In: Leather SR, Watt AD, Mills NJ, Walters KFA, Edi-tors. 5A). J LJ Complete mitochondrial genome of The authors declare there are no competing interests. 2003. International Journal of Tropical Biology and Conservation 51(Suppl. Individual aphids were moni-tored for weight at birth (< 12 hr) and at the final molt during their development. Thus, several sister clones of the same genetic lineage of the two aphid clones were raised on their two host plant spe-cies. Interestingly, one aphid genotype (CU-3) established a population on excised cotton leaves too after feeding experience on artificial diet, and the population size of this genotype on cotton leaves was significantly larger than those of genotypes CU-1 and CU-2 ( F5,49 = 126.91, P < 0.001) (Fig. Insecticide resistance traits differ among and within host races in Aphis gossypii. In the green bug, Schizaphis graminum, several biotypes were distinguished on the basis of their perform-ance on different cereals (Bregovoy et al. Loxdale Aphids of taro clones achieved a significantly higher rate of increase than the aphids of brinjal clones (t = 24.11, df = 18, p = 0.01). Aphis gossypii Feeding experience induced the expansion of host range in some aphid genotypes but not all. E The aphid genotypes CO-2 and CO-3 established populations on the excised leaves of cucumber after feeding experience on artificial diet. Annals of the Entomological Society of America. Phloem amino acids and the host plant range of the polyphagous aphid, Special plant species determines diet breadth of phytophagous insects: a study on host plant expansion of the host-specialized. The survival and reproduction of the cohort of aphids were surveyed every two days until they died. Success of colonization of Aphis gossypii through gen-erations on their field hosts (control) and across host plants. Moursi The rm values on natal host leaves were 1.5 to 5.2 times higher than the values on the artificial diet for all six aphid genotypes. The experiment for each genotype reared on excised leaves from the natal and alternative host plants was performed with five and ten replicates, respectively. EM Host plant affiliations of aphid vector species found in a remote tropical environment. 1988; Powers et al. Aphis gossypii Typos, corrections needed, missing information, abuse, etc. Once cabbage heads form, this insect is difficult to control. Note: You are now also subscribed to the subject areas of this publication 6B), suggesting the expansion of host range. Twenty replicates were used in the study, ten on each plant species. : New Insights from the Genomic Era Agriculture Canada Technical Bulletin 1991-3E. The ratios of proboscis to body length and ul-timate rostral segments to body length showed distinguishable variations between the two aphid genotypes (Figure 3C, 3D). In spring, the eggs hatch and the aphids migrate onto their summer host when it becomes available. The time taken to reach the maximum popula-tion size (T) was calculated by the equation T = ∑no. Implications of Host‐Associated Differentiation in the Control of Pest Species. . A: mean values of growth rate (GR); B: maximum population size (Nt); C: time to attain Nt (T); and D: population trend of Aphis gossypii determined on potted wild plants of taro and brinjal. A comparison of fitness charaters of two host plant-based congeneric species of the banana aphid, Rearing and handling aphids. Testing for biogeographic mechanisms promoting divergence in Caribbean crickets (genus Amphiacusta). Forbes, and D.A. Effects of pH and sucrose on rearing the cotton aphid, Aphids on the world’s crops: an identification and information guide, Feeding patterns of monophagous, oligophagous, and polyphagous insect herbivores: the effect of resource abundance and plant chemistry, Constitutive and induced differential accumulation of amino acid in leaves of susceptible and resistant soybean plants in response to the soybean aphid (Hemiptera: Aphididae), Behavioral and morphological responses of an insect herbivore to low nutrient quality are inhibited by plant chemical defenses, Synthesis of the essential amino acid tryptophan in the pea aphid (, Nutritive quality of plant protein: sources of variation and insect herbivore responses, Activation of plant foliar oxidases by insect feeding reduces nutritive quality of foliage for noctuid herbivores, Insect symbionts as hidden players in insect-plant interactions, The evolution of ecological specialization, Genomic evidence that resource-based trade-offs limit host-range expansion in a seed beetle, Polymorphism and methylation of four genes expressed in salivary glands of Russian wheat aphid (Homoptera: Aphididae), Phenotypic plasticity in host-plant specialization in. Further study is needed to determine which specific nutrients are involved. Significant differences between the clones from two host species were also recorded in development time, generation time, fecundity, intrinsic rate of increase, net reproductive rate, and mean relative growth rate. Genetic variation amongst biotypes of Dactylopius tomentosus. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed. 6B). Heavily infested leaves show dispersed or loose ag-gregate of aphids without any continuity between the colonies (Figure 1A). In greenhouses, up to 51 generations can be produced in one year. SJ In the second treatment, A. gossypii aphids were transferred from the wild brinjal field host to wild taro as the laboratory host. Excised leaves and old plants might have reduced defensive traits and improved nutrients to aphids compared to vigorously growing tissues, so aphids from other hosts might survive on them. Literature references. Vanlerberghe-Masutti We B: treatment II: A. gossypii of taro transferred to laboratory host brinjal.
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