Abstract
Chinch bug [ Blissus leucopterus leucopterus (Say.)] is the insect most likely to cause economic damage to pearl millet [ Pennisetum glaucum (L.) R. Br.], a promising alternative feedgrain crop for the Southeast and Mid-South regions of the United States. In-furrow application of insecticide offers early season protection against chinch bug but may be phytotoxic. The insecticides that control early season infestations in other crops were evaluated for phytotoxic effects on pearl millet emergence and seedling growth under greenhouse conditions. Phorate caused the most phytotoxicity, reducing seedling emergence to less than 7% and shoot weight to 12 mg per seedling (17% of the non-treated control) at dose rates of 50.4 and 67.2 mg a.i. pot −1. Aldicarb, chlorpyrifos, and terbufos all caused some phytoxicity expressed by reduced seedling emergence. No phytotoxicity was observed with tefluthrin and tebupirimphos+cyfluthrin, either of which could be recommended for in-furrow application if effective against chinch bug on pearl millet.
Published Version
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