Controlling Tuta absoluta (Meyrick) by Selected Crude Plant Extracts in the Laboratory and in the Screen House
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
David Publishing
Abstract
Effects of Commiphora swynnertonii, Synadenium glaucescens and Allium sativum extracts on the tomato leaf miner, Tuta
absoluta (Meyrick) were evaluated on the adults and in screen house conditions. The adult stage was involved with 30 adults that
were reared in an insectarium, the experimental design was a completely randomized design (plant extracts from three plants species
three doses of 2%, 4% and 8%). In the screen house, experimental dispositive was a completely randomized block design (two
varieties of tomatoes three plants extracts). Larval counts were performed after 0, 1, 2, 3 and 7 d of treatment, 40 tomato leaves (10
4 replicates) were randomly taken from each treatment. The mean percentage mortality of adults was recorded daily for 5 d.
Results indicated that, each plant extract caused significant mortality to adults of T. absoluta after 5 d in comparison to the control.
Leaf dipping against adult of T. absoluta proved to be the most effective for all plant extracts at 30%-100%. Commiphora resulted in
the adults’ mortality of 100%. In the screen house Commiphora showed the high reduction of infestation for Tanya and Cal J
varieties. Treatment with this plant extract resulted in the highest fruit yield and the lowest yield loss compared to all the plant
extracts. C. swynnertonii extract is recommended into integrated pest management strategies for the control of T. absoluta.
Description
Journal Article
Keywords
Plant pesticide, Insect control, Tomato, Tuta absoluta