الفهرس 
Ecological studies on leaf minersOnly 14 pages are availabe for public view
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Abstract
Experimental fields were examined during two successive growing seasons
(2007 and 2008) at the Experimental Farm in Agriculture Research Center in
Qaluobia Governorate. Summer and winter plantations for bean, while broad bean
and pea were seeded during the winter plantations. Leaf miner adults emerging from
each host plant were identified by the Entomological Collection in Pest Classification
and Surveying Division, Plant Protection Research Institute and Department of
Entomology, Faculty of Science, Ain Shams University. To study the sampling and
distribution of leaf miner species, I used dispersion analysis with Taylor’s power law
(1961), a regression of (log variance+1) and (log mean+1) for each species of leaf
miners eggs, mines and larvae S2 = a mb.
• Most leaf miners collected from bean, Phaseolus vulgaris, leaves were Liriomyza
bryoniae (Kaltenbach), with small numbers of L. trifolii collected during
September and early March.
• All leaf miners collected from broad bean, Vicia faba, samples were Liriomyza
trifolii (Burgess).
• All leaf miners collected from pea, Pisum sativum, leaves were Phytomyza
atricornis (Meigen) (= Chromatomyia horticola) (Goureau).
Results indicated that the leaf position are probably related to high numbers
for L. bryoniae on leaf four to leaf six on Ph. vulgaris on leaf five to leaf nine for L.
trifolii on V. faba and on fourth leaf to fifth leaf for C. horticola on P. sativum.
All regression coefficients from Taylor’s power law were statistically
significant indicating that eggs, mines and larvae of all three species were aggregated
(b > 1), making it possible to estimate the density of each species of leaf miners in
the field. from the results, I determined the sample size (number of leaves) that should
be collected from the field to estimate the population density of the three leaf miners.
Selection of 20-30 leaves will effectively estimate each species of leaf miner. This
sampling plan is sufficient to monitor pest populations for purposes of management
and permit further study of leaf miner population characters.
B. Biological and statistical life tables studies of the leaf miners.
1- The life history of Liriomyza trifolii and Liriomyza bryoniae on two host plants
under laboratory conditions of 18-23 oC and 60-75 % RH.
Results showed that the biological characters and life cycle of two leaf miners.
L. bryoniae were better on bean plants than on broad bean plants. While, L. trifolii
were better on broad bean plants than on bean plants.
2- Effect of the host plant species on life tables of L .trifolii and L. bryoniae under
laboratory conditions of 18-23 oC and 60-75 % RH.
This study provides information needed to understand population dynamics of
L. trifolii and L. bryoniae on the two host plants and which could be useful in
breeding for host plant resistance and developing pest management programs. Results
showed that the females of L. bryoniae can produce 1.105 female offspring / day on
bean plants, and 1.056 females / day on broad bean. The female of L. trifolii give
1.117 female / day on broad bean plants, and 1.060 female / day on bean plants.
There were differences in generation time, net reproductive rate, and intrinsic rate of
natural increase of L. trifolii and L. bryoniae according to host plant species, but the
finite rate of increase did not differ greatly.