development of fenvalerate

fenvalerate has two chiral centers. technical-grade fenvalerate consists of equal portions of the four stereoisomers. it is 10-20 times more potent than conventional insecticides such as organic phosphates and carbamates. because only a $alpha$ fenvalerate is bioactive, its activity is four times greater than current technical-grade fenva..

optimal allocation and scheduling of irrigation water for cotton and soybeans

this study evaluated alternative irrigation scheduling strategies for cotton and soybean production on sharkey clay soils in southeast arkansas. strategies were ranked on the basis of two basic criteria: expected net revenue and risk efficiency. risk efficiency was defined for different risk preferences using stochastic dominance techniqu..

surface potential of cellulose

charge/ph isotherms were determined for various cellulose fibers: cotton linters, bleached sulfate and unbleached sulfate pulp the charge was determined as a function of ph in 1. 0, 10** $minus$ **1, 10** $minus$ **2 and 10** $minus$ **3 mol dm** $minus$ **3 nacl the effect of various cations on the charge was also investigated the surfac..

electrometric titration curves of a few oilseed proteins

electrometric titration curves and isoelectric points of castor, sunflower, mustard and cottonseed proteins have been reported. by carrying out such titrations at different temperatures and employing van't hoff equation, the heats of ionization in different ph regions have been calculated. this enables identification and estimation of var..

usloviya truda obsluzhivayushchego personala pri ochistke khlopka-syrtsa na vorokhoochistielyakh. $left bracket$ working conditions of the attending personnel during raw cotton cleaning with the use of cotton extractors $right bracket$

working conditions of personnel during raw cotton cleaning with the use of cotton extractors are discussed. in russian

conveying machine-stripped cotton with an inclined wire belt

the feasibility of conveying and elevating machine-stripped seed cotton using an inclined wire belt conveyor was investigated conveying performance was satisfactory at belt inclinations up to 25 deg. problems that adversely affected conveying performance were apparent at angles of 27 to 30 deg, and these problems became steadily more seve..

insecticide washoff from cotton plants as a function of time between application and rainfall

methyl parathion (mp), toxaphene (tox), and fenvalerate (fen), as emulsifiable concentrates, were tank mixed with water and applied at 1. 5 $plus$ 2. 30 $plus$ 0. 11 kg active ingredient/ha to cotton plants (triplicate plots) by ground equipment. simulated rainfall (51 mm) was applied. the fraction of mp washed from the plants decreased e..

factors affecting size distribution of vegetable oil spray droplets

droplet size measurements were made to obtain definitive information on the effects of several factors on the size distribution of cottonseed and soybean oil spray droplets produced by fan nozzles under simulated aerial application conditions. results indicated that the droplet size distribution is affected by airspeed, nozzle orientation..

effect of area of growth on condensed tannins in cotton bracts

the specific component of cotton dust that is the cause of byssinosis has not yet been determined. bract fragments are a large component in cotton dust, and this paper is concerned with one of the classes of compounds that occur in cotton bracts. bracts of cotton plants (gossypium hirsutum) of three varieties grown in three states were ex..

irreversible chemisorption of formaldehyde on cotton cellulose

at low temperatures (lower than 65 $degree$ c), sorption of formaldehyde on cellulose is reversible as indicated by complete extractability of the sorbed formaldehyde in water. at temperatures higher than 65 $degree$ c, a fraction of the sorbed formaldehyde is irreversibly bound to cellulose and cannot be recovered by extraction with wate..