Cereal crops, resistance aphids

Resistance of Cereal Crops to Aphids Role of Allelochemicals... 

Remarkable selectivity of action has now been achieved in some cases, such as the herbicides controlling the pest wild oats in cereal crops, and insecticides like Menazon attacking aphids but not bees and ladybirds. The increasing attention to selectiveness in activity also promises to reduce problems of resistance and cross-resistance which have been encountered with broad-spectrum pesticides like DDT and the organophosphates. 

Pirimicarb is a selective aphicide against organophosphate-resistant green peach aphids on a wide variety of crops including cereals, fruits, potatoes, sugar beets, and vegetables. It kills insects by contact, translaminar, systemic action, and vapor. Its oral LD50 in rats is 147 mg/kg. 

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