Backpack Mistblower Research Articles

Tomato Miscellaneous Pests

Abstract Tomatoes were planted in the field from seed on May 12,1975 in 25 ft rows on 5 ft centers. Soil type was Ockley silt loam, 2 to 4% organic matter. Fifteen treatments including the check were arranged in a randomized block design, 1 row per treatment separated from the next treatment by an untreated row. Four replicates were used. Four applications were made at 10 day intervals beginning August 7 using a Back-pack mist blower (Vandermolen KWH 66), output of which was about 15 gallons per acre. Aphid counts were made by selected 10 leaves from each replicate and counting the aphids thereon. Numbers thereof were about equally divided between M.euphorbiae and M.persicae. Fruit damage by fruitworms and hornworms was assessed by examining from each replicate the first 100 fruit for characteristic feeding damage.

Efficacy of insecticides and methods of insecticidal application for control of stable flies in Nebraska.

Nine insecticides were tested as residual sprays, four as animal sprays and two as area sprays for control of Stomoxys calcitrans (L.). Of the residual sprays, only Shell SD-8447 (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate) as 75% wettable powder (wp); Mobam® (benzo[ b ]thien-4-yl methylcarbamate) as 80% wp; and propoxur as 17% emulsifiable concentrate (EC) applied at a rate of 1.3 oz/1000 ft2 reduced infestations 50% or for 2 weeks or longer. Of the animal sprays, 0.5% dilutions of ronnel as 25% EC (¼ gal/cow), crotoxyphos 67 as 46.7% EC (½ gal/cow), and methoxychlor 50 wp (¼ gal/cow) reduced stable flies 75% or more at 1 day post-treatment, but only crotoxyphos and methoxychlor reduced populations 50% or more at 4 days posttreatment; however, after 7 days the number of flies on all treated animals was equal to or greater than the number on the untreated control herd. The 2 area sprays (dichlorvos as 44.5% EC or 0.2 lb/acre and naled as 58% EC or 0.19 lb/acre) applied with a truck-mounted mist blower reduced populations of stable flies an average of 62 and 67%, respectively, at 1 day posttreatment. The same doses applied with a backpack mist blower gave similar results.