Power Sprayer Research Articles

Studies on the Computer Aided Design of Power Sprayer (III)

Studies on the Computer Aided Design of Power Sprayer (III)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (III)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (III)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (IV)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (IV)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (II)

Erratum to : Studies on the Computer Aided Design of Power Sprayer (II)

Studies on the Computer Aided Design of Power Sprayer (IV)

Studies on the Computer Aided Design of Power Sprayer (IV)

Black Walnut Curculio Control, Missouri 1973-75

Abstract An experimental control program for the black walnut curculio was conducted over a three-year period in a 5-acre stand of mature black walnut located in Cedar County, Missouri. Initial spray dates for the first two years were established on adult emergence dates obtained from available literature. For the final year, the first spray date was based on emergence dates established through adult trapping. Spray dates in 1973 were May 15, May 30, and June 12; in 1974, May 30 and June 17; and in 1975, May 7, May 15, and June 11. Trees were selected and flagged to represent three spray groupings and one control group of five trees each in one block. Three such blocks were established for a total of 60 trees. The spray groups received applications of Guthion 2S, Benlate (WP), and a mixture of the two. Guthion was mixed at a rate of 24 oz/100 gal water. Benlate was mixed at 2 lb/100 gal of water. Eight tablespoons of Plyac a spreader-sticker were added to each 100 gallon formulation. Benlate was tested in an effort to reduce walnut anthracnose. When possible, spraying was done in the evening. At all times the wind was less than 10 mph with temperatures in the lower 70’s. Sprays were applied with a 150 gallon capacity Broyhill power sprayer the first year. The following two years a farm tractor carrying a 55 gallon drum with a PTO powered pump served as the spray unit. As nuts dropped they were collected and dissected for curculio larvae. Data were recorded as to presence or absence of larvae and total nuts collected per spray group.

Studies on the Computer Aided Design of Power Sprayer (II)

Studies on the Computer Aided Design of Power Sprayer (II)

Tobacco Budworm on Flue-Cured Tobacco: Percentage Control with Insecticides Abnormally Low in Early 197012

Insecticides applied with a power sprayer to replicated field plots of flue-cured tobacco in 1968–72 were evaluated vs. artificial infestations of Heliothis virescens (F.) of similar insecticidal susceptibility. Significantly less control of budworm larvae and damage was obtained with methomyl in early 1970 than in 1968–69, 1971–72, and late 1970. In early 1970, methomyl provided 35 and 25% control of larvae and damage, respectively. In the other seasons, control of larvae and damage with methomyl averaged 82 and 72%, respectively. When tested in early 1970, carbaryl, endosulfan, monocrotophos, Supracide® (O,O-dimethyl phosphorodithioate, S-ester with 4-[mercaptomethyl]-2-methoxy-Δ2-1,3,4-thiadiazolin-5-one), TDE, and Thuricide HP® ( Bacillus thuringiensis Berliner) also performed poorly vs. the tobacco budworm. The abnormally low insecticidal control obtained in early 1970 appeared to be related to low rainfall and low relative humidity. Observations suggest that the effects of low moisture on tobacco plants and budworm larvae reduced the effectiveness of insecticides.

Tobacco Budworm: Control On Flue-Cured Tobacco with Certain Microbial Pesticides12

In advanced field test during 1964–72, certain commercial formulations of Bacillus thuringiensis Berliner and a nuclear polyhedrosis virus of Heliothis zea (Boddie) were applied with a power sprayer to flue-cured tobacco at dosages suggested by the manufacturers for tobacco budworm, H. virescens (F.), control. The lower dosages of B. thuringiensis and the virus were usually as effective as the higher dosages, and addition of certain insecticidal and non-insecticidal products to B. thuringiensis spray did not increase its effectiveness. Thuricide®, Biotrol® BTB-183, and Dipel® brands of B. thuringiensis were usually as effective as 1.5 lb/acre of TDE or carbaryl and sometimes as effective as 0.5 lb of methomyl. Biotrol® VHZ and Viron® /H brands of the virus were usually less effective than TDE or methomyl. In a preliminary test, a noncommercial preparation of Nosema necatrix Kramer provided significant but less control than methomyl.

Studies on Organization of Labour-saving Management in the Young Tea Field

To establish the organization of labour-saving management in the young tea field, some examinations had been carried out from 1966 to 1970.The result can be summarized as follows.1. It took so much time to dig the ditch by hand for transplanting, but the use of tractor with 16 inched bottom plow in large saved about 13% of time.2. Thick growth of weed had a worse effect upon the growth of young tea plant, so the weeding at intervals of thirty days was necessary for young tea plant.The mechanical weeding with rotary tiller had a better effect within 15cm of weed height.3. To control tea pests and disease, the power sprayer and swath sprayer were used, the latter's working time being 27.5 min/10a, about 42% of the former's one.4. The yield of tea leaves was 108.6kg/10a in the third year, 395.5kg/10a in the fourth year, and 732kg/10a in the fifth year from planting.5. From these experiments, making the larger compartment of tea field and equipment with some farm machinery were confirmed to be necessry to establish the organization of laboursaving management in the young tea field, and several pending problems had been arisen.

Basic Studies on the Application of Rotary Pump for Power Sprayer

Basic Studies on the Application of Rotary Pump for Power Sprayer

Studies on the Pumping Performance of Power Sprayer (IV)

Studies on the Pumping Performance of Power Sprayer (IV)

Studies on the Pumping Performance of Power Sprayer (III)

Studies on the Pumping Performance of Power Sprayer (III)

Studies on the Pumping Performance of Power Sprayer (II)

Studies on the Pumping Performance of Power Sprayer (II)

Chemical control of rice sheath blight by high power sprayer and duster

Chemical control of rice sheath blight by high power sprayer and duster

Studies on the Pumping Performance of Power Sprayer (III)

Studies on the Pumping Performance of Power Sprayer (III)

Power sprayers, dusters discussed in new USDA publication

Power sprayers, dusters discussed in new USDA publication

Power sprayers, dusters discussed in bulletin

Power sprayers, dusters discussed in bulletin

The Distributions of Coumaphos on Cattle from Limited-Volume Mist Sprays and One-Gallon Saturating Sprays

The distributions of coumaphos deposited on cattle by automatic mist sprayers and more conventional large volume power sprayers were determined by analyzing hair samples pulled from selected locations on treated animals. Wind and incorrect nozzle placement caused much of the variation in spray deposits left by automatic sprayers. Hair characteristics affected the spray deposits left by power sprayers. A linear correlation between the spray deposits from power sprayers and the weight of hair was positive and highly significant. The data indicated that automatic sprayers are capable of providing distributions as uniform as those provided by power sprayers.

Control of Ticks on Cattle with Toxaphene Applied by Power Sprayer and Spray Race1

Control of Ticks on Cattle with Toxaphene Applied by Power Sprayer and Spray Race1