In spite of the economic importance of powdery mildew on cucurbits, literature and databases about the fungal species reveal different species numbers and names, often indicating only two species, with inconsistent host specificities for different members of Cucurbitaceae. Revision of the available literature indicates the presence of at least six species of powdery mildews on Cucurbitaceae wit...

the mealybug fauna of southern iran (systan & baluchestan, hormozgan, bushehr, khuzeztan and fars provinces) is unknown to many coccidologists. in this paper, 17 mealybug species from the south of iran with their host plants are reported.maconellicoccus hirsutus (green), nipaecoccus viridis (newstead) and planococcus ficus (signoret) are the important pests and ferrisia virgata (cockerell), dys...

nutritional indices of the willow leaf beetle, plagiodera versicolora laicharting, third instar larvae and adults were studied on four host plants including salix alba l., salix aegyptica l., populus caspica bornm.and populus alba l.at 22 ± 2 ºc, 70 ± 10% r.h., and a photoperiod of 16:8 h (l: d). the results showed that the highest consumed food by the larvae and adults (148.5 ± 18.0 and 175.21...

a list of 20 species of the subfamily tephritinae (diptera: tephritidae) from the urmia region (azarbaijan-e gharbi province, iran) is presented. the specimens were collected during 2005-2008 from six different localities. adults were obtained from overwintering and mature seed heads of 17 plant species of asteraceae. the species, urophora xanthippe (munro, 1934) is newly recorded for the fauna...

one of the most important predator-prey interactions is functional response which its type and parameters are affected by different factors including host plant characteristics. in this research, the influence of leaf surface on functional response and prey consumption rate of third instar larvae of the episyrphus balteatus (de geer, 1776) (diptera: syrphidae) to third instar nymphs of aphis go...

The location of wild and cultivated host plants by pepper weevil (Anthonomus eugenii Cano) may be aided by visual cues, the male-produced aggregation pheromone, herbivore-induced, or constitutive host plant volatiles. The attractiveness of constitutive plant volatiles to pioneer weevils is important in understanding, and perhaps controlling, dispersal of this insect between wild and cultivated ...