PRACTICAL HINTS TO NURSERYMEN 119 



multiply by 0.25 (twenty-five hundredths) and divide 

 by 28.35, as indicated above, and you will obtain the 

 correct amount in ounces. Always bear in mind that 

 fumigation will admit of no guesswork, as success 

 depends on accuracy. 



Low-grade stock, as indicated in Chapter III. , should 

 not be fumigated with the 0.25 gramme formula. The 

 o.i 6 or o.i 8 formula should be used for June budded 

 peach or plum, low grade peach and plum, known 

 as whips, and for scions, buds, grafts, etc. In using 

 this formula, the cubic contents of an enclosure should 

 be multiplied by o. 16 or o. 18, as the case may be, and 

 reduced as above to ounces. 



Cost of nursery stock fumigation. It is difficult to 

 ascertain the exact cost for fumigating young trees 

 per thousand. The conditions under which the trees 

 are grown and handled in most States varies consider- 

 ably. In most cases, nurserymen who have had much 

 experience along this line have found that the ordi- 

 nary first-class grade of fruit trees can be fumigated at 

 a cost not to exceed twenty-five cents per thousand 

 trees. This amount includes the chemicals and extra 

 labor in handling. However, the cost of the fumiga- 

 ting house or box is not taken into consideration. In 

 many cases where a room can be filled with trees the 

 cost of fumigation can be reduced from ten to fifteen 

 cents per thousand trees, depending upon the grade 

 and kind. It is often necessary to fumigate a small 

 bundle of trees in a large room or enclosure. In such 

 a case, the quantity of chemicals necessary to fill the 



