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• W2912234172 abstract "<p>Mealybugs (Hemiptera; Pseudococcidae) are one of the noxious sucking pests infesting ornamental and horticulture crops including citrus. It is emerging as a severe threat to citrus industry in Indo-Pak region. This study determined <em>in-vitro</em> toxicity of different botanical extracts <em>viz</em>; neem (<em>Azadirachta indica</em>)<em>,</em> sour orange (<em>Citrus aurantium</em>), sweet orange (<em>Citrus sinensis</em>)<em> </em>and<em> </em>eucalyptus (<em>Eucalyptus camaldulensis</em>) against adult females and 2^nd instar nymphs of <em>Drosicha mangiferae</em>, a mealybug species regularly infesting citrus crop since last decade. Water, ethanol and acetone were used as extraction solvents. Leaf-dip and twig-dip methods were used for 2^nd instar mealybug nymphs and adult female individuals, respectively. Five concentrations (0, 8, 16, 32 and 64%) of botanical extracts were bioassayed with four replications for each. Mortality of insects was observed at 24, 48 and 72 h post-treatment for nymphs and at 24 and 48 h post-treatment for adults. Data was subjected to probit analysis and two-way factorial ANOVA taking time and concentration as factors. Results revealed that the most toxic botanicals with minimum LC₅₀ values against citrus mealybug adults were acetone extracts of <em>A. indica </em>and <em>E. camaldulensis</em> followed by ethanol extracts of <em>C. sinensis </em>seeds and <em>C. aurantium </em>leaves, while the most effective botanicals against 2^nd instar mealybug nymphs were aqueous, ethanol and acetone extracts of <em>A. indica </em>and <em>E. camaldulensis</em> followed by ethanol extracts of <em>C. sinensis </em>peels and <em>C. aurantium</em> seeds. As expected, 2^nd instar nymphs were found more susceptible to all extracts as compared to adult female individuals, most probably due to reduced penetration of botanical extract in adult insects due to powdery cushion on body. It is concluded that botanical insecticides can play a significant role in the management of insect/mite pests as being substitutes of toxic and hazardous synthetic chemicals. Particularly, neem (<em>A. indica</em>) and eucalyptus (<em>E. camaldulensis</em>) could be effective options against mealybugs and other hemipterous pests, and should be incorporated in the future pest management programs.</p>" @default.
• W2912234172 created "2019-02-21" @default.
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• W2912234172 date "2018-12-18" @default.
• W2912234172 modified "2023-10-10" @default.
• W2912234172 title "INSECTICIDAL EFFECTS OF ACETONE, ETHANOL AND AQUEOUS EXTRACTS OF Azadirachta indica (A. Juss), Citrus aurantium (L.), Citrus sinensis (L.) AND Eucalyptus camaldulensis (Dehnh.) AGAINST MEALYBUGS (HEMIPTERA: PSEUDOCOCCIDAE)" @default.
• W2912234172 doi "https://doi.org/10.56369/tsaes.2489" @default.
• W2912234172 hasPublicationYear "2018" @default.
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