REPELLANCY EFFECT OF CERTAIN PLANT EXTRACTS AND OILS AGAINST HOUSE SPARROW BIRD AND HEAD INSECTS IN SORGHUM FIELDS.

Document Type : Research articles.

Authors

1 Plant Protection Research Institute, ARC, Dokki, Giza, Egypt.

2 Sorghum Department, Field Crops Research Institute, ARC, Giza, Egypt.

Abstract

The efficacy of seven plant extracts and five plant oils were
tested as repellents to house sparrow bird,
Passer domesticus niloticus
and three head worms; Autoba (Eublemma) gayneri, Cryptoblabes
gnidiella
and Pyroderces simplex on Dorado variety under field
conditions in Sids Agric. Res. Station, Beni-Sueif Governorate during
2005 and 2006 seasons. This work revealed that, the bird damage was
generally clearly higher for grains during the mature stage (8.6-
45.9%) than those of the dough stage (2.1-8.2%). The plant extracts
and oils caused a grain yield protection from the bird damage as 36.3-
69.7 and 27.4-81.2% as well as, in the same time decreased the insect
numbers with about 3.8-100.0% during the two considered stages,
respectively. The plant extracts showed a higher efficiency against the
sparrow bird in the mature than in dough stage, the vise was happened
with the oils. Effects of the plant extracts differed according to the
insect species. In this respect, cumin WE was the best against all
insects, depressed their populations, in general, with about 42.0-79.1
and 68.4- 100% in the two years, respectively. On the other side, the
lowest efficiency was from wormwood AE (26.7- 34.0% decrease)
and lupine WE (6.9-29.7%) in the first and second seasons,
respectively. While the neemix oil, was relatively the strongest in the
first year, depressed the insect population with about 38.7-54.9%, the
0lupine oil was the strongest in the second season (35.1-81.3%).
Coriander oil showed the least effect, 3.8-53.2% depression only.


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