Insecticide resistance in the pest complexes of rice, wheat, maize and stored cereals represents one of the most consequential evolutionary responses to human chemical intervention in South Asian agriculture, yet the evidence supporting resistance management decisions in India remains uneven in both quality and coverage. This review evaluates critically the state of knowledge on the evolutionary toxicology of insecticide resistance in Indian cereal ecosystems, treating resistance as the outcome of quantifiable evolutionary parameters rather than as a descriptive property of pest populations. Literature was identified through open scholarly indexes and metadata registries, supplemented by citation searching, and appraised for design adequacy, mechanistic depth, geographical relevance and evidential alignment with the claims made. Four analytical themes are developed. First, the selection landscape of Indian cereal systems is characterised by near-continuous host availability, short generation times, extensive dispersal and a narrowing set of effective modes of action, a combination that theory predicts should accelerate adaptation. Second, mechanistic understanding of field-evolved resistance in rice planthoppers, stem borers and stored-grain beetles derives predominantly from East Asian, Brazilian and Australian laboratories, so that mechanisms are frequently assumed rather than demonstrated for Indian populations. Third, phosphine resistance in stored cereals constitutes the clearest exception, since an India-specific dihydrolipoamide dehydrogenase variant has been characterised genetically and surveyed at high frequency in southern India. Fourth, the Indian field literature is dominated by short-term efficacy trials and single-season bioassays that cannot estimate allele frequencies, dominance, fitness costs or rates of change, which are precisely the parameters that resistance management strategies require. The principal unresolved questions concern the frequency and geographical structure of resistance alleles in Indian populations, the magnitude and modifiability of fitness costs, and whether recommended rotations achieve genuine heterogeneity of selection at the scale at which pests actually disperse. Resistance management in Indian cereals will remain provisional until longitudinal, genotype-based surveillance replaces episodic phenotypic screening.
S. Satapathy, Amrusha Debata, Subhradipta Dash et al.· Uttar Pradesh Journal of Zoo...· 0 citations
Vegetable production in India depends heavily on repeated insecticide application, and the arthropod species that dominate these systems have responded with rapid and repeated adaptation. The result is a control problem that is simultaneously toxicological, ecological and institutional, yet the literature describing it remains fragmented across pest-specific and state-specific studies that are seldom read against one another. This critical narrative review examines what is currently known about the toxicology of insecticide resistance in Indian vegetable cropping systems, organised around three questions: which physiological and molecular mechanisms are actually demonstrated in Indian populations, how reliably resistance frequency can be estimated from the available monitoring data, and which control measures are supported by evidence rather than by plausibility alone. Literature was identified through structured searching of accessible scholarly indexes and citation networks, with every retained source verified against its bibliographic record. The synthesis indicates that mechanistic understanding in Indian material is dominated by indirect biochemical inference, principally synergist ratios and enzyme assays, while direct molecular confirmation of target-site alleles or specific detoxification genes remains confined to a small number of pests, chiefly the diamondback moth, the whitefly species complex and the eggplant fruit and shoot borer. Reported resistance ratios span several orders of magnitude for the same compound across studies, but much of this variation is attributable to inconsistent reference strains, differing bioassay formats and unstandardised sampling rather than to true biological difference, which makes national frequency estimates unreliable. Evidence for control tactics is similarly uneven: rotation by mode-of-action group and the deployment of transgenic eggplant rest on comparatively strong reasoning and, in the latter case, on field data from the wider region, whereas insecticide mixtures, synergist-based tactics and many biopesticide recommendations remain supported mainly by short-term efficacy trials that cannot demonstrate durability. Residue monitoring shows widespread but generally sub-threshold contamination of vegetables, indicating that dietary risk and resistance are related but not interchangeable concerns. Priorities identified include a harmonised national bioassay and reference-strain framework, molecular diagnostics deployed at population scale, and management trials designed with resistance durability rather than seasonal yield as the primary outcome.
S. Satapathy, Chetana Guru, Madhusmita Bal et al.· Archives of Current Research...· 0 citations
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