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BIOLOGICAL STUDY OF ORIENTAL SPIDER MITE EUTETRANYCHUS ORIENTALIS (KLEIN) IN LABORATORY ON GRAPEFRUIT AND LEMON LEAVES.

Authors :
Aljboori, Hala K. J.
Al Dahwi, Sindab S. J.
Source :
Plant Archives (09725210); Oct2020, Vol. 20 Issue 2, p384-388, 5p
Publication Year :
2020

Abstract

The study included the effect of two types of citrus in some aspects of the biology of the oriental spider mite Eutetranychus orientalis (Klein), lemon Citrus limon, Var. Mahali and grapefruit Citrus paradisi, var. Duncan at temperature (25 ± 2°C), relative humidity (50-60%) and 12-hour light duration to 12 hours of darkness at the graduate insect laboratory at the college of Agricultural Engineering Sciences/University of Baghdad. Results showed that the food preference of the host species had a direct effect on the growth period of the immature stages of the oriental spider mite survival rate when arise on those species, it recorded the shortest period of egg incubation and larval and nymph development and life cycle and highest survival rate for spider mite stages arise on lemon were recorded 4.03 days, 6.97 days, 11.00 days and 65.97%, respectively. While, the longest duration of egg incubation, larval and nymph development and the lowest survival rate of spider mite stages arise on grapefruit were 4.93 days, 7.96 days, 12.89 days and 57.60%, respectively. The biological and reproductive parameters of the spider mite adults were arise on the lemons and grapefruit. It recorded the longest age of female and male adults, the shortest pre-egg laying period, the longest duration of egg laying and post egg laying and the largest total egg and the number of eggs per day, the largest percentage of egg hatch, the shortest length of the generation and the highest percentage of sexual adult eggs grown on lemons with 13.4, 8.0, 1.67, 8.2, 3.53 days, 39.09, 4.77 eggs, 69.5%, 12.63 days and 1.3:3 respectively. Whereas, It recorded the shortest age of female and male adults, the longest pre-egg laying period, the shorter duration of egg laying and post egg laying and the smallest total egg and the number of eggs per day, the smallest percentage of egg hatch, the longest length of the generation and the lowest percentage of sexual adult eggs grown on lemons with 12.23, 7.33, 1.87, 7.37, 3.0 days, 29.46, 4.0 eggs, 64.3%, 14.76 days and 1: 2 respectively. Thus, sour lemon is the most preferred and appropriate to nourish the oriental spider mite and its growth and development than of grapefruit. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09725210
Volume :
20
Issue :
2
Database :
Complementary Index
Journal :
Plant Archives (09725210)
Publication Type :
Academic Journal
Accession number :
147768583