30 GUAM AGRICULTURAL EXPERIMENT STATION. 



Cowpea. Cowpeas are attacked b}^ the melon aphis, Aphis gos- 

 sypi'i, which are heavily parasitized. A lepidopterous larva com- 

 monly mines and splits the leaves. It is about f inch long, wholly 

 red, with distinct segmentation. The moth is a small tineid. 



Pigeon i:>ea. Pigeon peas were badly infested with an armored 

 scale, but the scale is very much parasitized by Tomocera. 



Peanut. An armored scale and a mealy-bug, Psevdococcus virgatus, 

 are commonly found on the peanut. The stored nuts are damaged 

 by the caterpillar of a phycitid moth (probably Ephestia). 



Cassie. The pods are badly eaten by a tortrix, Cryptophlebia 

 illepida. 



Crotalaria. The pods are eaten by the slug-like caterpillar of 

 Lycmm h(Btica. The plant is also attacked by a stem borer, but the 

 adult was not secured in breedinof. 



FRUITS. 



Mango. There are two varieties of mango in Guam ; the more fre- 

 quent one has a very superior fruit. The trees are -angularly free 

 from insect pests. A small geometrid was reared from a caterpillar 

 taken on mango foliage; a mealy bug, Psendococcus sp., was taken 

 on the roots ; and the larva of a phycitid moth working between fruits 

 was bred; but no serious pests were found on this handsome and 

 valuable tree. 



Citrus. Citrus trees are badly infested with a mealy bug, Pseudo- 

 coccus citri, and Aonidiella aurantii. The fluted scale is also bad at 

 times and occasionally plant lice resembling Myzus citricidus are 

 found on the trees. 



Breadfrait. The breadfruit is not very much attacked by insects. 

 An infestation of plant lice, believed to be Aphis gossyp^i, was once 

 observed. 



Banana. The banana also is rather free of insect pests. Plant lice 

 resembling Pentalonia nigronervosa are found beneath the sheaths 

 on the lower stem. 



Avocado. No pests were found on the avocado, which has been 

 introduced from Hawaii within recent years. 



Soursop. Two mealy bugs were commonly found on the soursop. 

 Pseiulococcus virgatus and an undetermined species of the same 

 genus. 



Pineapple. A mealy bug, Pseudococeus hroynelice, is very injuri- 

 ous to pineapples, occuri'ing in clusters at the base of the fi^uit. 

 blighting it to some extent and producing rot. 



Strawberries. Xo pests were noticed on strawberries. 



Peaches. None were noticed on peaches. 



Watermelons. Plant lice, probably Aphis gossypii, commonly in- 

 fest watermelon plants. This species is heavily parasitized. 



