CONTROL OF CYCLAMEN AND BROAD MITES ON GERBERA 1 3 



the old plants, placed them on the large tray in the treating tank 

 (fig. 7), lowered them into the water for treatment, and raised them 

 from the water at the end of the treatment, to drain off the excess 

 water. A second group of men who had not handled the infested 

 plants, removed the plants from the tray, carried them in boxes to 

 the greenhouse, and planted them in the beds. The men washed their 

 hands in the hot-water tank before they handled the treated plants 

 if it ever became necessary for them to handle the untreated ones. 

 The foliage of treated plants was never permitted to touch the floor 

 in the treating room, which was kept free of all litter and was fre- 

 quently washed with a hose. The order in which the houses were 

 replanted was arranged so that untreated plants were never carried 

 through any of those being replanted or being prepared for replanting. 



Figure 9. — View of gerberas in full flower and snowing no injury by mites. 



As shown in figure 8, the gerberas are planted in a reclining posi- 

 tion with the long-stemmed leaves arranged in one direction. The 

 old foliage is damaged less in the cultivation of the beds when the 

 planting is done in this manner than when the old leaves are allowed 

 to fall in any direction, as they would if the plants were set upright. 



Figure 8 shows the upright new leaves appearing above the reclin- 

 ing old foliage 10 days after the plants were treated and replanted. 

 The luxuriant growth and numerous flowers and buds of plants 4 

 months after they had been treated and planted are shown in figure 9. 

 The methodical procedure followed in treating and transplanting the 

 large stock of gerberas was rewarded by the apparent elimination of 

 the cyclamen mite, and further treatments at the end of the following 

 two flowering seasons were unnecessary. 



