| OCR Text |
Show For Extermination of Worm Enemies of Bulbs Cerlaln celvvorms, or nematodes, are very Injurious to narclisus mid other bulbs. How to kill these worms without Injuring the bulbs has been a question. Scientists of the I'nlted Slates Department of Agriculture found that it could be ibuie with general success by treatment treat-ment with hot water or vapor heat Still some of the pe-ts survived. Thcc survivors proved to be a minority mi-nority of the population which were quiescent, or taking a Rip Van Winkle Win-kle nap In the bulb. The worms which were active at the time of Treatment were more eailly killed. Kxperimeiiting further, thee scion liits ol.-ervcd Ih.-it tcu)ierat ores of 70 to S'P decrees Fahrenheit, applied by either hot water or vapor heat, induced activity among the-o quiescent quies-cent or dormant nematodes which were resting In the bulbs. It seems, then, that growers who wish to treat bulbs with hot water or vaor heat to kill worms of this typo should Prst keep the bulbs at a temperature tempera-ture of 70 to M degrees Fahrenheit In wale.- or vapor for two hours to awaken the dormant worms and stimulate them to activity. |
