Testing research on effects of top layer rice fog drop interception on pesticide spraying distribution in rice fields
Recherche expérimentale sur l'interception de la pulvérisation par une culture de riz
Résumé
Research on fog drop interception by top layer rice plant during pesticide spraying provides technical data for the optimum design, performance improvements and correct use of the sprayer. A solution of rhodamine B mixed with water in 0.1% concentration was used instead of pesticide to spray rice fields. Rice plant leaves were collected along the altitude direction of rice growth in three layers using a sampling frame. The deposit of spraying fog drop on rice plant in every layer was measured by means of a fluorescence spectrophotometer. Tests were conducted in early season and late season rice fields. A conclusion was reached that top layer rice fog drop interception could not improve the uniformity of droplets deposition of the mid layer or bottom layer