. Bulletin. Agriculture -- New Hampshire. and thoroughly. As it is not possible to get all the insects at one time, the operation should be repeated weekly for some time. A reinfestation may easily occur if other plants in the home have thrips, for the manettia vine is much to their taste. The same control measures are suitable for aphis and mealybug on this plant. It should also be noted that thrips are much more troublesome at higher temperatures around 70° F or above. Suggested summer care Some growers rest their manettia plants out-of-doors in a sheltered spot during summer. Still others
. Bulletin. Agriculture -- New Hampshire. and thoroughly. As it is not possible to get all the insects at one time, the operation should be repeated weekly for some time. A reinfestation may easily occur if other plants in the home have thrips, for the manettia vine is much to their taste. The same control measures are suitable for aphis and mealybug on this plant. It should also be noted that thrips are much more troublesome at higher temperatures around 70° F or above. Suggested summer care Some growers rest their manettia plants out-of-doors in a sheltered spot during summer. Still others grow them indoors the year around. â More vigorous and satisfactory plants may be had by starting new plants from slips early each summer. If grown indoors in good soil, these sum- mer-rooted slips will bloom all the following winter and spring. Baby Primrose Primula malacoides* The baby primrose or Primula malacoides is one of the pot plants ordinarily grown by florists and sold when in full bloom. Often these plants are not too satisfactory because the sudden change from green- house to home conditions is too much for them at this stage. To be most successful as flowering house plants they should be purchased when in bud or earlier. Plants in the proper stage are usually available from florists during late fall and early winter and often at lower prices than when in full bloom. Of 20 plants grown by as many growers their condition or degree of success was as follows: 12 good to excellent, two fair, and six poor or failure. Of the six plants rated poor or failure three were vegetative but. Fig. 21a (left)âThe baby primrose can give 5 months of bloom if prop- erly cared for. Fig. 21b (right)âUnless primroses have a cool night temperature they may fail to flower. (See plant on left.) The plant on right has flowered and is in need of plant food "This species does not cause a skin lash such as that caused by some other species of primula. Forty-three. Please note that th
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