Cotton insects and their control in Missouri

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Suggestions for spraying : commercial apple orchards

"January 1962"Provides a suggested pesticide spraying program for commercial apple orchards as well as suggestions on how to handle conditions such as fireblight or pests.H.G. Swartwout and W.R. Enn

Linear and Non Linear Effects on the Newtonian Gravitational Constant as deduced from the Torsion Balance

The Newtonian gravitational constant has still 150 parts per million of uncertainty. This paper examines the linear and nonlinear equations governing the rotational dynamics of the torsion gravitational balance. A nonlinear effect modifying the oscillation period of the torsion gravitational balance is carefully explored.Comment: 11 pages, 2 figure

A concept for adaptive performance optimization on commercial transport aircraft

An adaptive control method is presented for the minimization of drag during flight for transport aircraft. The minimization of drag is achieved by taking advantage of the redundant control capability available in the pitch axis, with the horizontal tail used as the primary surface and symmetric deflection of the ailerons and cruise flaps used as additional controls. The additional control surfaces are excited with sinusoidal signals, while the altitude and velocity loops are closed with guidance and control laws. A model of the throttle response as a function of the additional control surfaces is formulated and the parameters in the model are estimated from the sensor measurements using a least squares estimation method. The estimated model is used to determine the minimum drag positions of the control surfaces. The method is presented for the optimization of one and two additional control surfaces. The adaptive control method is extended to optimize rate of climb with the throttle fixed. Simulations that include realistic disturbances are presented, as well as the results of a Monte Carlo simulation analysis that shows the effects of changing the disturbance environment and the excitation signal parameters

Suggestions for spraying commercial apple orchards, 1967

"1, 67/1500"Suggested spray program -- Special pest discussion -- Comments on spray materials and combinations -- A lead arsenate program -- spray residues.B.G. Tweedy, W.R. Enns and H.G. Swartwout (Departments of Horticulture and Entomology

Using New Selection Tools

The goal of most beef production systems is to increase or at least maintain profitability. Producers can attempt to increase profitability in a variety of ways that might include reducing feed costs, changing their marketing program, or perhaps by changing the performance of their herd through genetic improvement. Focusing on this latter option, there are two primary genetic tools available: selection and mating where selection refers to the selection of breeding animals and mating includes which females are mated to which bulls, for example, crossbreeding systems. This paper focuses on the former, the selection of the appropriate animals for a production system with the goal to improve profitability. The best tool available for making selection decisions is expected progeny differences (EPD). Over the years the number of EPD available to guide producers in making selection decisions has grown from 5 to over 15 in most cases. Simply put, the amount of information that the breeder must sift through to try to make a good selection decision has become overwhelming. The producer must determine which EPD have the greatest influence on their income and their expenses, and by how much—a daunting task. Historically this task has depended on the “intuition” and experience of the breeder. For instance, they know that selection for heavier weaning weight will increase the weight of calves sold at weaning, but that blind selection for weaning weight will also increase calving difficulty and if replacements are kept, likely increase cow size and feed costs. Breeders have been performing a balancing act with little concrete information on how important each of those traits is to their profitability. Fortunately, there are several tools that have recently become available to ease the process of combining the costs and the revenues of beef production with EPD to make selection decisions that will produce progeny which are more profitable

Blister beetle management in alfalfa

"In Missouri, blister beetles are an infrequent pest of alfalfa. When present in sufficient numbers, however, the consequences can be serious. These insects cause only limited plant damage to alfalfa and soybeans. But when ingested by livestock, especially horses, the animals may become sick and even die. These insects produce a highly toxic drug called cantharidan."--First page.Wayne C. Bailey and Wilbur R. Enns (Department of Entomology), and Wayne E. Loch (Department of Animal Science, College of Agriculture)Revised 1/90/6

suggestions for spraying commercial grape vineyards, 1967

Information for commerical grape vineyards, including spray programs, quantities of sprays to apply, when to spray, and general pest information. Written for application in Missouri in 1967.W.R. Enns, B.G. Tweedy and H.G. Swartwout (Departments of Horticulture and Entomology

Blister beetle management in alfalfa (1993)

In Missouri, blister beetles are an infrequent pest of alfalfa. When present in sufficient numbers, however, the consequences can be serious. These insects cause only limited plant damage to alfalfa and soybeans. Striped blister beetle, Epicauta vittata, and other species of blister beetles, may occur in large numbers within localized areas of soybean and alfalfa fields during July and August. Rapid defoliation can occur, but the real problem with blister beetles is that they produce cantharidin, a toxin which, when ingested by horses, can cause the animals to become sick and possibly die. This publication provides some general information about blister beetles, their effect on livestock, and guidelines for reducing the number of these beetles in alfalfa