Management of insect pests of broccoli, cowpeas, spinach, tomatoes, and peanuts with chemigation by insecticides in oils, and reduction of watermelon virus 2 by chemigated oil.
Insecticides applied in centre-pivot irrigation systems in Georgia, USA, in 1981-83 effectively controlled insect infestations and damage to various crops. On spinach, diazinon controlled Liriomyza sativae and carbaryl Lygus spp. On tomatoes, permethrin controlled Leptinotarsa decemlineata and Heliothis spp. and propargite Tetranychus urticae. On broccoli, fenvalerate controlled Trichoplusia ni, Pieris rapae [Artogeia rapae] and Plutella xylostella. On cowpea [Vigna unguiculata], permethrin, fenvalerate and encapsulated parathion-methyl controlled Chalcodermus aeneus. On groundnut, carbaryl controlled Frankliniella spp. and H. zea, thiodicarb H. zea, and chlorpyrifos cicadellids. Spread of watermelon mosaic virus 2 was reduced by 50% by similar treatment with Suntec 7N oil.