Sentence Examples with the word boll

No certain remedy is known for the destruction on a commercial scale of the boll weevil, but every effort has been made in the United States to check the advance of the insect, to ascertain and encourage its natural enemies, and to propagate races of cotton which resist its attacks.

The Indians in part of Guatemala raise cotton, although the boll weevil is abundant.

Indian boll worms include the same species, and the closely related Earias fabia, which also occurs in Egypt.

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The fruit or boll is round, containing five cells, each of which is again divided into two, thus forming ten divisions, each of which contains a single seed.

Special interest attaches to experiments made in the United States to endeavour to raise races of cotton resistant to the boll weevil.

The damage may be only slight, or the entire boll may ripen prematurely and become dry and dead.

The Egyptian boll worm (Earias insulana) is the most important insect pest in Egypt and occurs also in other parts of Africa.

The researches of Bouche-Leclercq, Cumont and Boll have enabled us to fix with a considerable degree of definiteness the middle of the 4th century B.C. as the period when Babylonian astrology began its triumphal march to the west, invading the domain of Greek and Roman culture and destined to exercise a strong hold on all nations and groups - more particularly in Egypt - that came within the sphere of Greek and Roman influence.