Evaluation of plant-derived products against pests and diseases of medicinal plants: A review

Advances and Trends in Organic Fruit and Vegetable Farming Research

“…Direct control measures in the form of biopesticides such as neem extract (azadirachtin) preparations were developed (Schmutterer 1990;Isman 2006Isman , 2008Gahukar 2011;Isman et al 2011;Fondevilla and Rubiales 2012;Gahukar 2012;Martin et al 2013) and found to be useful for organic horticultural crops. Some countries, however, limit or ban the use of neem extract as an insecticide and fungicide.…”

Plant-Growth-Promoting Rhizobacteria (PGPR) and Medicinal Plants

“…According to Gahukar (2012), leaf and seed extracts in water (5-10 %), seed cakes (250 kg ha À1 ), crude oils (0.5-3 %), or essential oils (3,000 ppm) have been effectively used to control inter alia the sap-sucking pests, foliar diseases, and rootknot nematodes. Traditional and commercial products, especially those derived from neem (Azadirachta indica A.…”

Antifeedant and Toxic Effect of Crude Extract from <i>Flourensia oolepis</i> and their Impact on Nutritional Parameters of <i>Helicoverpa gelotopoeon</i>

“…Their secondary metabolites have different modes of action (pest repellents, growth retardants, antifeedants and lethal toxins), and having been studied against insects (Nathan, 2006;Gahukar, 2012). For the control of arthropods, particular attention has been paid to Asteraceae species, among these, chilca, Flourensia oolepis Blake (Diaz-Napal et al, 2009).…”

“…An environmentally acceptable alternative with proven effectiveness is the use of plant extracts, which have low persistence and are rapidly degraded (Gahukar, 2012). These crude extracts are usually mixtures of chemicals that produce a great variety of responses in different organisms (Begum et al, 2013).…”