52 



egrsrs will be mostly Laid in these crops instead of in t lie 



OCT I 



cotton, These traps would be of no use unless they were 

 removed and fed to stock, or otherwise disposed of, before 

 the caterpillars are full-grown, so as to accomplish I heir des- 

 truction, [f they are allowed 1<> remain until the moths 

 emerge, the traps merely provide for increased infestation of 

 the cotton. 



Tim RED MAGGOT {Porricoiulyla Q088ypii, Coquillett). 



Diptera. 



The red maggot is the larva of a small fly related to 

 the flower-bud maggot, and like that one, is too small to 

 be seen and recognized. It was first discovered in Barbados 

 in 1903, and in one or two seasons since that time has been 

 fairly abundant. In 1905, a very large proportion of the 

 cotton plants in certain fields was destroyed. The red 

 maggot occurs under the bark of the stem of the cotton 

 plant. The maggots when full-grown are nearly ( \-inch 

 in length and of a reddish colour. They feed upon the 

 soft tissue of the bark and developing wood. When the 

 feeding of these insects extends completely around the 

 stem, it causes the death of all the portion beyond that 

 spot. The presence of the red maggot is always indicated 

 by a discoloured and shrunken area of bark. It has not 

 occurred as a pest in any of the islands except Barbados 

 although it has been recorded from Montserrat. The 

 attacks of this insect have been made in rather singular 

 manner, no field or estate having reported a severe attack 

 in two succeeding years. For its control it is necessary 

 that any plants seen to be affected should be pulled 

 up, or the affected part cut out and promptly burned. 

 Old cotton plants should be destroyed as soon as the 

 crop is reaped. 



the cotton aphis (Aphis gossypii, Glover). Hemiptera. 



The cotton aphis is a small, greenish insect, often to 

 be found on the under side of the leaves of cotton and other 

 plants. It has sucking mouth parts, and when it occurs 

 in extreme abundance causes serious injury to the plant. 

 The aphis, plant louse or green-fly, as it is commonly 

 called, is usually more abundant in dry, than in wet, 

 weather. 



