Tomato Lycopersicon Esculentum Mill Case Study

Topics: Tomato / Pages: 7 (1642 words) / Published: Sep 15th, 2016
Introduction
Tomato Lycopersicon esculentum Mill is one of the most important crops in many parts of the world particularly in Egypt. It is consumed as a fresh table tomato and as an essential raw material for a variety of food processing industries. Tomatoes are grown in both greenhouses and in open fields. The tomato leaf-miner, Tuta absoluta (Meyrick) (Lepidoptera:
Gelechiidae) is a serious pest of both open fields and greenhouses. It is a South
America species (Giordano & Silva,
1999) and recently became an alime species in Europe subsequently spread throughout the Mediterranean Basin
(EPPO, 2011). This pest was first recorded from eastern Spain in late 2006
(Urbaneja et al., 2007) then Morocco,
Algeria, France, Greece, Malta, Egypt
and
…show more content…
This reasoning indicates that
20% of the variability of the infestation was due to the plant age of H6 hybrid.
The rating sort showed that the plant age ranked the first (Table 1).
H7 hybrid: In respective to H7 hybrid, it was found that the plant age also occupied the first rank with a relative efficiency for about 25% out of about
90% total efficiency (8 variables). This testimony indicates that plant age was responsible for 25% of the infestation variability of T. absoluta larvae. It is well known that the older plant leaves are not suitable for feeding habits and spawning behavior for most of phytophagous insects. The rate of egg exclusion, proportion of females, the larval period and mortality appeared to be affected by plant age. A higher proportion of females, mortality of larvae and length of the larval period were obtained with older plants of Lycopersicon hirsutum f. glabratum while the rate of egg exclusion was higher in case of L. hirsutum young plants aged 3 months
(Leite et al., 2001).
Mirid bugs
H6 hybrid: Data in Table (1) and Figure
(2) showed that mirid bugs seemed to

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