EXPERIMENT STATION BULLETINS. 



827 



(UBBAGE APHIS (Aphitibrassicu-). 



Although not so destructive to cabbages as the cabbage worm, the little 

 downy green lice, that cover so many of tlie cabbages in the fall, are about 

 as unpleasant a pest as we have, and they take a great deal of nutriment 

 from the plants, too. Late in the fall eggs are laid on the cabbage leaves 

 for the next year's brood, and for this reason all refuse leaves and stumps 

 should be burned, or gathered and fed to stock. This will greatly aid in 

 reducing the number of lice for the next season. As a remedy, kerosene 

 emulsion is the most ett'ectual, but it must strike the lice on both upper 

 and under side of the leaves, and wherever found, else many will escape. 



CABHAGE-LEAF MINER [Plutella cruciferarum Zell.). 



Occasionally this leaf miner has proven harm- 

 ful to cabbages, rutabagas, and similar cruciferous 

 plants, by the young larva> boring into the leaf 

 between its upper and under surface and raising 

 a blister by feeding on the aiibstance of the leaf 

 and making small dead spots before the larvje 

 mature. 



Remedies. — Paris green is recommended for the 

 miner, but I believe hot water, as advised for the ^^j^j 4^ 

 cabbage worm, will prove more effectual. 



Moth of the (Cabbage 

 Letif Miner. 



INSECTS OF THE CUCUMBER AND S(^U.\SII. 



THE STRIPED CUUIJMBEK BEETLE LDiabroUca vittata Pabr.). 



If the only harm done by' this insect was by 

 the imago above ground, we could control 

 its work much better, but the beetle lays its 

 eggs at the base of the roots and the little 

 wliite grubs resulting from them feed on the 



1^^,,,. .__, root all through their development. This ofteu 



rrji T uffi causes the plants to suddenly die without any 



'v^l wj] apparent cause, but if the plant is pulled up, we 



K"l /ill ^'^^1 ^^® ^^^^^ ^^^^ ^"Ot^^ ^^ badly gnawed or entirely 



eaten off. The same beetles are equally as harm- 

 ful on melons and nearly as bad on squashes. 

 There is also a plant disease that is 

 carried by these striped beetles, and if 

 we can keep them from the plants we 

 in a large measure prevent this disease 

 from its attack. The disease makes 

 Pig. 47.-striped cacumber Beetle and Larvtf*. ^^g appearance when the plants are 



large and beginning to run, and they die as suddenly and unexpectedly as 

 does the S()uash from the same disease. 



Re)tte<Ues. - Carbolized lime or tobacco dust are either one very good in 

 protecting these plants, provided, we dust the plants before the beetles 



