. The pear thrips (Taeniothrips inconsequens Uzel) and its control in British Columbia [microform]. Pear thrips; Insect pests; Thrips; Insectes nuisibles, Lutte contre les; Thrips du poirier; Thrips. 27 nullifying the escape of the thrips once they had reached the tul)e8. As well a« bemg an accurate mdex of the period of emergence, the counts obtaineil by the use of these trap-cages represented the actual number of thrips that were present in the two square feet of soil covered by the boxes n^Z The average of the numbers emerging in six boxes throughout the orchard represented roughly the deg
. The pear thrips (Taeniothrips inconsequens Uzel) and its control in British Columbia [microform]. Pear thrips; Insect pests; Thrips; Insectes nuisibles, Lutte contre les; Thrips du poirier; Thrips. 27 nullifying the escape of the thrips once they had reached the tul)e8. As well a« bemg an accurate mdex of the period of emergence, the counts obtaineil by the use of these trap-cages represented the actual number of thrips that were present in the two square feet of soil covered by the boxes n^Z The average of the numbers emerging in six boxes throughout the orchard represented roughly the degree of infestation of thrips in the soil. As a method of assistmg the orehardist m his operations, no better plan than these trap- cages could be employed for determining accurately the first appearance of the thrips at the beginning of the season. Necessarily, the boxes be stoutly ma<le, and all possibility of cracks, even the most minute, eliminated. Fig. 10.â('ombined trap-rnno nni vials, and fitted into the holes of the soil cmergenre-hoxes, in the orchard at Royal Oak. Vancouver island. X 2. (Original). 1 h 'Ti f''^^â¢"â **** apparatus consisting of an inverted, cone-shaped, muslin i)ag (hg. 11), suspended from an overhanging branch, will be found to provide an excellent indication to the orehardist of the first emergence of the thrips. Ihe lower margin is provided with a circular piece of stout iron wire, which serves to keep the bag extended. Sods are placed firmlv around the base m order to keep it in position and to prevent the escape of the insects. The whole apparatus is nothing more or less than an net made of stout, close-meshed muslin. It should be examined every day for the presence of adult thrips, then turned inside out, shaken, and replaced in its former position. Thus the orehardist will obtain a fairly accurate idea of the daily increase or in the numbers emerging, and will he enabled to decide the period of ma
Size: 1403px × 1782px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectpests, bookyear
