26 The Bulletin. 



over a large area, so that detailed treatment of all the individual 

 plants is impracticable, he should use the dusting method of ap- 

 plying dry poison. This is fully discussed under remedies for the 

 Cotton Boll- worm on page 38. So far as practicable care should 

 be taken to direct the poison to the opening squares and blooms. 



If the injury is confined to a restricted area, a more thorough 

 treatment can be made by using a regular spray pump and applying 

 Paris Green in water at the rate of one ounce to every eight gallons. 

 The nozzle must be directed so as to thoroughly dampen all the young 

 squares, opening blossoms, etc. where the insects feed. We could not 

 expect this spraying treatment to pay merely by benefit to the plants 

 treated,, but the greatest good would come by preventing further 

 spread into new parts of the field. 



Should these methods of treatment seem impracticable, perhaps a 

 strip or belt of plants around the infested area could be treated so 

 that in their further spread the insects would encounter the poisoned 

 plants and be checked. 



We have no special reason to believe that any method of culture, 

 rotation, etc., can be used that will avoid or diminish the ravages 

 of this pest. 



It is especially to be hoped that this will not become a serious 

 and regular pest, for if it were every year to be widespread in 

 destructive numbers its ravages would be very great and our remedies 

 might not prove altogether satisfactory for such universal outbreaks. 



THE COTTON RED SPIDER. (Tetranychus gloveri.) 

 (Also known as "Rust-inite," "Rust," and by other names.) 



Description. — A tiny mite or "spider," barely noticeable to the 

 naked eye, which occurs in great numbers on the under side of the 

 leaves, causing them to turn reddish or "rust." Later they turn 

 yellowish brown and fall from the plant. The little mite is yel- 

 lowish-green or reddish in color. 



Notice. — This little creature causes one of the several different 

 troubles which most, farmers know without distinction under the 

 name of "rust."- There are other forms of rust, sometimes caused 

 or aided by a fungus or by bacterial diseases, or sometimes by the 

 presence or absence of certain chemical elements in the soil, but this 

 Red Spider or Rust Mite is one of the most frequent afflictions that 

 pass under the name of "rust." It does some injury almost every 

 year in midsummer, but usually becomes widely destructive in times 

 of long continued dry weather. 



Injury in North Carolina. — Since 1900 the years of 1902 and 

 1905 have witnessed the most destructive outbreaks of this creature. 

 It has been reported from many counties scattered over our cotton- 

 growing region, though the principal area of injury seems to be in 

 a belt about two counties wide, extending across the State from 



