Rose chafer

Insects provide another difficulty. One of the axioms of entomology is that in the Northern Hemisphere, insect populations are larger and more varied in the eastern parts of a continental mass. In addition to its other problems, eastern viticulture must do constant battle against numerous voracious insect pests. The rose chafer regularly appears just in time to nip off inflorescences as they are about to flower. The Japanese beetle turns every leaf of a grapevine into a piece of lace, if allowed to. In the Tidewater sections of the lower part, nematode infestation can be so severe as to make viticulture almost impossible. 

Leaves skeletonized. Cause Leaf-feeding beetles. Japanese beetles are prime suspects here, although other beetles, such as spotted cucumber beetles and rose chafers, may also attack. Handpick or spray with a solution of 1 tablespoon 70 percent isopropyl alcohol to 1 pint prepared pyrethrin mixture. Repeat every 3-5 days until beetles are gone. 

Leaves and flowers skeletonized. Cause Rose chafers. This /s", reddish brown beetle with thick, yellowish hairs on its wing covers appears in late spring and damages both leaves... 

Leaves skeletonized flowers eaten. Cause Rose chafers. Rose chafers, also known as rose bugs, skeletonize foliage and damage... 

In 1822, fish oil by itself was advocated for the control of certain caterpillars. A money prize was offered in 1842 by the Massachusetts Horticulture Society for the cheapest and most effective insecticide to destroy the rose chafer. This prize was awarded for the recommendation of vrfiale-oil soap. 

William Forsyth is said to be the first (1800) to advise the use of whale oil against scale insects on plants (6). By the 1850s, vtole oil soap was found to be the cheapest and most effective insecticide to destroy rose chafer. By 1866 vegetable oils replaced kerosene by being much safer. Free vegetable oil found little use in the U.S. and other countries where petrol xn and coal tar pr rations were developed. 

Cave painting from Lascaux and a rose chafer. 

---