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Ger ane ee Cental 
MEALY BUGS 
Mealybugs are small, sluggish, whitish, soft bodied insects, measuring up to !/4 inch long, found in 
clusters on the undersides of the leaves or in the leaf axils. 
INJURY. This pest sucks the juices from the stems and leaves, discoloring and deforming the foliage. 
CONTROL. Regular fumigations with Calcium Cyanide will aid in keeping mealybugs in check. The 
combination of Greenhouse Volek |-50 and Nicofume liquid 1-400 when applied when tempera- 
tures are below 90 degrees will give good results. Loro 1-800 and DuPont Spreader Sticker |-1200 
if sprayed when temperatures are not too high is very effective. The old method of syringing 
with water is still one of the easiest ways to keep the plants free of this insect. 
MITES 
Cyclamen mite and broad mite are often found on the same plants at the same time. Broad mite 
could pass through a complete generation in 4 to 5 days at 70 to 80 degrees while the Cyclamen 
mite will take 4 to 5 times longer. 
INJURY. Infested leaves become deformed, curl from the outside inward, and wrinkle so that pockets 
and pit-like depressions are formed. When the infestation is severe, the mites collect about the 
buds, causing them to blight. 
CONTROL. Vapotone containing HETP has given good control. Thiocide !-200 and DuPont Spreader 
Sticker |-800 is an effective control measure. We recommend spraying every week or ten days dur- 
ing the growing season. Nicotine liquid |-400 plus spreader, NNOR may also be used and will 
give fair control. Sodium Selenate is effective when applied in liquid form '/4 gram per square 
foot after plants are well established. 
RED SPIDERS 
There are several species of red spiders that attack the chrysanthemum. They vary in color through 
yellow, orange and red. The body is oval in outline and bears eight well-developed legs. 
INJURY. Red spiders pierce the epidermis of the leaf and draw the liquid contents from the cells, 
causing the leaf to turn pale around the injured portion. They prefer to collect on the under 
surfaces of thé leaves, which they cover with silken threads. 
CONTROL. HETP containing insecticides such as Vapotone or Hexcide are by far the most effective 
on red spider. Spray thoroughly and heavily with Yamtox or some rotenone sprays as NNOR, L333, 
OPTOX at intervals of five days until the spider is cleaned up. Moisture is detrimental to the 
development of the red spiders and frequent syringing washes them and their eggs off the plants. 
Loro |-800 plus DuPont Spreader Sticker |-1200 has given good control but should be applied 
with caution as it will injure foliage when temperatures are high. Sodium selenate is effective 
when applied in liquid form 4 gram per square foot after plants are well established. 
SYMPHYLIDS 
Symphylids are small white creatures about Ye to 7%» inches long. About 40-60 days are necessary 
for the completion of the life cycle. 
INJURY. Symphlids destroy the fine root hairs and small rootlets, thus stunting the plants and often 
killing them outright. 
CONTROL. If possible construct raised bench. Steam sterilization has given fair control. Dowfume G 
and the new Greenhouse Isotox Dust are giving excellent control of this pest. 


Red Spider Injury Mealy Bugs Symphylids Enlarged 10x 

