GENERAL CROP PESTS 



91 



doing injury to parsley, pea, endive, cotton, orchard and small 

 fruits and roses. Its color is yellow, with the thorax tinged 

 with orange, and the antennx or feelers are ringed with a dusky 

 color (fig. 15)- It is distributed from Canada to Florida, and 

 westward. 



Remedies. — The same as for the onion thrips. 

 The Red Spider {Tetranychus bimacidatus Haw.). — Few 

 vegetables are free from the attacks of red spider (fig. 50jr). 



These creatures are extremely 



minute, and are frequently 



not noticed until they become 



excessively numerous, as hap- 

 pens during summer droughts. 



They do considerable damage 



in vegetable gardens and to 



plants grown under glass. 



Remedies. — Flowers of sul- 

 phur, mixed with water at the 



ration of one ounce to the 



gallon, and sprayed over the 



plants, is of great value in 



eradicating this pest. Fish-oil 



and other soap solutions are P's- 50x.-Red spider, a, Adult; b. palpus-, 



c, claws. (After Banks, U. S. Dept. Agr.) 



valuable, and the addition of 



sulphur increases their effectiveness, but are too strong for 

 some delicate plants. Greenhouse plants are sprayed with 

 water two or three times a week during the growing season, 

 and care is exercised to wash off the spiders and not drench 

 the beds. 



