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GLADIOLUS THRIPS 

Thrips, both larvae and adult, cause injury to gladioli by rasping the surface of the leaves, spikes, and flowers 
until the cells are ruptured, then lapping up the sap. The excess sap soon dries, giving the plant a silvery appearance. 
After a few days the injured area becomes dry and brown. Flowers produced by injured plants are deformed, shabby, 
and unattractive. Severely injured plants often fail to flower. 
Each female thrips lays about 200 eggs over a period of three to four weeks. During the summer these eggs are de- 
posited just below the surface of the leaves in the green plant tissue. In warm weather the larvae hatch from the eggs 
in about five days, and immediately begin feeding. 
Once established in a field of glads, thrips can cause total crop destruction before a single flower spike develops. 
Thrips are so minute, and so secretive in their habits, that detection is not easy. Before leaf feeding begins, they can be 
detected by a slight browning along base of inner edge of leaves. This is the time to begin treatments. 

On growing gladioli use: 
AGICIDE SPRAY BASE e containing 1.25% Rotenone. This effectively controls thrips, yet will not 
injure plants in any stage of growth, nor is it injurious to the operator working with if. 
Spray infested gladioli thoroughly with a mixture of 14 Tablespoonfuls of Agicide Spray Base stirred 
into 5 gallons of clean water, or 1 Ib. per 20 gallons. Repeat every five days until four or five treatments 
have been applied—to cover successive hatchings. 
GOLD DOT SPRAY BASE e containing 50% D. D. T. If preferred, infested gladioli may be sprayed 
with a mixture of 1 ounce (4 Tablespoonfuls) of Gold Dot Spray Base to 5 gallons of water, or 1 Ib. to 
100 gallons. Repeat in weekly intervals until four or five treatments have been applied. 

WINTER STORAGE OF GLADIOLUS BULBS: 
Thrips present on glads in fall, migrate to the bulbs, and lay their eggs in the fleshy tissue under the 
leaf base. Here they overwinter. If the storage room is warm, they reproduce and feed on the bulbs, 
often destroying enough to prevent later germination. 
Treatment: Place several dozen of cleaned bulbs or corms into a strong paper bag. Add a handful 
of Agicide Spray Base, just as it comes from the package. Close bag, and gently shake up and down 
to effect a complete dust-covering of all bulbs. Store bulbs in this bag, covered with dust, until spring. 
Large quantities of bulbs: Take clean flats or shallow boxes. Shake a thick coating of Agicide Spray 
Base powder over entire bottom of box. Cover with cleaned bulbs. Shake thick coating of Agicide 
Spray Base over top. Cover with several layers of newspapers, and store in cool, dry, dark place 
until spring. 

Write for name of nearest dealer. 
AGICIDE LABORATORIES, INC. 
RACINE * WISCONSIN 
