AGRICULTURE
What are the natural enemies of plant lice? 82.
What insects keep herds of plant lice as "milch cows"? 82, 76.
What valuable service does the ladybug give to farmers? 1019.
How did the Australian ladybird save the orchards of the Pacific Coast?
1019. What destructive insect has spread from San Jose, California, to every
state in the Union? 1687.
How was it carried from place to place? 1687. How are maple trees damaged? 1687.
How are the twigs marked when this pest is present? 1687. What insect is destructive to vineyards? 795. What moths work havoc on the grapevine? 1270. What causes young grape leaves to curl up? 1270. What moth strips the foliage from fruit and shade trees? 1271. What does the army worm look like? 109. What are the natural enemies of the army worm? 109. How does the ichneumon fly destroy caterpillars? 912. How does the cotton boll-weevil destroy the cotton fibre and seed? 465. How is the Department of Agriculture trying to fight the boll-weevil?
465.
When did the boll-weevil come from Mexico? 465. How does the plum weevil bury her eggs in the fruit? 2064. What insect destroys the strawberry patch? 2064. How are beetles useful; and how are they destructive? 194. What are the natural enemies of the beetle? 194. How long does it take an army of canker worms to devastate a large
grove of trees? 323.
How should trees be protected from canker worms? 323. What bird was brought from England to fight the canker worm pest?
322.
What do the cut worms feed on? 491. How may plants be protected from cut worms? 491. In what part of the United States has the chinch bug caused a loss of
$60,000,000 in a single year? 389. How is the chinch bug marked and colored? 389. What states suffered a loss of $200,000,000 from grasshoppers between
1874 and 1876? 796.
How were they successfully combated in 1877? 796. Is a grasshopper different from a locust? 796. How are locusts destroyed? 1106. Is the katydid harmful to vegetation? 993. How many eggs are found in a peach tree borer? 1434. During what months should trees be gone over for the peach tree borer?
1434.
On what part of the tree are the eggs laid? 1434. What is the appearance of the tobacco and tomato worms? 1918. When should a tobacco worm by no means be destroyed? 1919. What are hawk-moths? 851.
How are jimson weed and molasses used for combating this pest? 1919. What did the potato bug feed on up to 1859? 1537. How many years did it take the potato bug to spread over the entire
United States? 1537.
How does the gall fly deposit its eggs on plants? 688. How does the stable fly differ from the house fly? 688. What crop has suffered immense damage from the Hessian fly? 870. Whereabouts on the grain stalk does the young Hessian fly fasten itself?
870.
How can this pest be destroyed? 870.
What destructive house pest is often found on currant bushes? 340. What insect feeds on flies and butterflies and robs the honey bee on her
way home? 886.
What are young wasps fed on? 2050. How do insects use the gall nuts or oak apples found on the leaves and
stems of oak trees? 1368.
What greedy insects will eat through book covers? 418. How are insects useful t<& the flowers? 930.
2300
