Hand-held spray guns and lances are the most widely used methods of crop protection in greenhouses despite the heavy workload and high risk of operator exposure associated with these techniques (Foqué 2012). These spray application techniques have also proved to be less effective than spray boom equipment under many conditions while the advantages of using vertical boom sprayers compared with u...

Autodissemination of insecticides is a novel strategy for mosquito management. We tested if contaminated Aedes albopictus (Skuse) mosquitoes from a small area treated with commercial formulations (79gm a.i. pyriproxyfen/ha) using conventional techniques, would disseminate pyriproxyfen over a wider area. Pyriproxyfen showed LC50=0.012 ppb for Ae. albopictus. Direct treatment and autodisseminatio...

Spray drift can be defined as the quantity of plant protection product that is carried out of the sprayed area by the action of air currents during the application process. Efficacy of pesticide applications in orchards and vineyards is highly dependent on matching the canopy characteristics with the liquid distribution on a vertical plane, this being influenced by the type of sprayer, the nozz...

Information on better utilizing airblast sprayers to achieve high pesticide spray application efficiency in nursery tree production is needed. Foliar spray deposition and coverage at different heights inside crabapple tree canopies were investigated for a conventional airblast sprayer operating at four different application rates ranging from 230 to 900 L/ha [24 to 94 gallons per acre (GPA)]. D...

This study was conducted to develop a software program which computes optimal path for autonomous navigation in orchard, especially for speed sprayer. Possibilities of autonomous navigation in orchard were shown by other researches which have minimized distance error between planned path and performed path. But, research of planning an optimal path for speed sprayer in orchard is hardly founded...

Relevance. More and more widespread use in the world, Ukraine particular, is acquiring a method of applying pesticides from air using unmanned aerial vehicles (UAVs, or drones). It expected that global agricultural market period 2018 to 2026 growth rate drone will be up +18.5%.
 Objective: hygienic assessment working conditions occupational risks when (UAVs), analysis their features compar...

Ground speed variations are common and unavoidable during pesticide applications with agricultural sprayers. Field tests were conducted to evaluate the effect of varying ground speeds on spray deposition quality a commercial boom sprayer without rate controller (CNS) in 2021 equipped (SRC) 2022. During each year, was split evenly among three different nozzle types (XRC, AIXR, TTI) attain drople...

The softening of a Gamma Ray Burst (GRB) afterglow bears remarkable similarities to the frequency evolution in a sonic boom. At the front end of the sonic boom cone, the frequency is infinite, much like a GRB. Inside the cone, the frequency rapidly decreases to infrasonic ranges and the sound source appears at two places at the same time, mimicking the double-lobed radio sources. Although a “lu...

Many asset markets exhibit a pattern of slow booms and sudden crashes. This paper presents an explanation for this unconditional asymmetry in asset price movements based on an endogenous speed of learning. In the model, more observable economic activity takes place in good times than in bad times. Since more observable activity generates more public information about the state of the economy, f...

Abstract Unmanned aerial vehicle (UAV) based crop spraying has become a popular alternative in the field of precision agriculture. One key goals UAV is achieving spray coverage that as uniform possible to ensure maximum efficacy. Most existing studies literature focus on analysing effects parameters uniformity distribution using experimental studies. However, this work, we propose novel general...