. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 28 MASS. EXPERIMENT STATION BULLETIN 249 Table 3.—Tho Average Number of Beetles Collected from Different Varieties of Apple Trees by Jarring from May 10 to July 26. Variety- Number of Trees Average Number of Curculios per Tree 1927 1!128 1927 1928 Delicious Baldwin Stayman Ben Davis 13 10 1 1 16 8 1 NATURE OF INJURY. Injury to apples results from punctures by the beetles and from burrows by the larvae. There are four distinct kinds: namely, egg punctures, early feed
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 28 MASS. EXPERIMENT STATION BULLETIN 249 Table 3.—Tho Average Number of Beetles Collected from Different Varieties of Apple Trees by Jarring from May 10 to July 26. Variety- Number of Trees Average Number of Curculios per Tree 1927 1!128 1927 1928 Delicious Baldwin Stayman Ben Davis 13 10 1 1 16 8 1 NATURE OF INJURY. Injury to apples results from punctures by the beetles and from burrows by the larvae. There are four distinct kinds: namely, egg punctures, early feeding punctures, larval burrows, and late feeding pimcturcs. The different kinds of punctures are clearly shown in Figure I. In addition to these kinds of injury the beetles may eat small holes in the caljrx and petals of buds and blossoms, and in Georgia (10) they feed extensively on peach leaves after the fruit has been harvested. Such injury is seldom seen in Massachusetts, and is of no economic importance. Pig-ure 1. Injury to Apple Caused Iby Plum Curculio. (After Fulton (4).) <*i<-^ a. Crescent Cut or Egg Puncture, surface view. b. Early Feeding' Puncture, sur- face view. c. Eg'g' Pixncture, cross d. Early Feeding- Puncture, cross section. t. Late Summer Feeding- Punc- tures- 1. Scars Resulting- from Cres- cent-shaped Eg-g- Punctures. m and n. Scars Resulting- from Early Feeding- Punctures. An Egg Puncture is by a characteristic crescent-shaped cut through the skin of the young apple about Vs of an inch long and extending into the flesh of the fruit the same distance. Soon after it is made, the edges of the cut form a rough, hard, dark brown scab which enlarges with the growth of the apple until at harvest it becomes a russet scar from H io 1/2 inch in diameter, somewhat irregular in shape but resembling an open fan and having little or no trace of the original cut. These scars are slightly raised and on some varieties, especially the Ben Da
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