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Mineral oil is the most used insecticide, both in acrage and in volume. 34,508,857 pounds (15,652,972 kg) of mineral oil was sprayed on 4,543,066 acres (about 1.8 million hectares). 1 to 4% solutions in water are sprayed, which is hundreds of times more than modern synthetic insecticides. Mineral oil is correspondingly cheaper.
Insecticidal soap is used to control many plant insect pests. Soap has been used for more than 200 years as an insect control. [1] Because insecticidal soap works on direct contact with pests via the disruption of cell membranes when the insect is penetrated with fatty acids, the insect's cells leak their contents causing the insect to dehydrate and die. [2]
White oil is sold commercially as a petroleum oil-based organic pesticide, in both a concentrate, [3] [4] [5] and ready-to-use spray bottle or can. [6] [7]The term "horticultural oil" may be used to differentiate this petroleum oil-based product from homemade products using vegetable oil.
Sprays with mineral oil (horticultural oil) or the use of systemic pesticides by trunk injection or soil drenches can control the elongate hemlock scale. [8] In North America, natural enemies of F. externa are not very efficient in suppressing the scale populations compared to Japan and as a result, the scale populations in Japan are much smaller.
For many vegetable crops, sulfur, copper-based products, chlorothalonil, horticultural oil, potassium bicarbonate, and Bacillus subtilis can be used for powdery mildew control. References [ edit ]
Chemical structure of some pyrethrins: pyrethrin I (R=CH 3), pyrethrin II (R=CO 2 CH 3). The pyrethrins are a class of organic compounds normally derived from Chrysanthemum cinerariifolium that have potent insecticidal activity by targeting the nervous systems of insects.