Ecological study on three major insect pests of tomato plantations in Fayoum governorate. [electronic resource]

Includes bibliographic reference

Tuta absoluta .(Meyrick), Nesidiocoris tenuis (Reuter) and Bemisia tabaci (Genn.) activities on tomato plants at Fayoum Governorate were evident during (nili and summer 2011/2012 & 2012/2013). The highest number of immature stages (larvae) of t.absuluta occurred in November & December 2011 and 2012 (37 and 25 indiv./10 leaves) respectively during niIi plantation , while the numbers of this insect were decreased during the summer plantation 2012 , the highest number recorded on June (20 indiv./10 leaves). There was highly significant correlation between the T.absuluta population and mean temp. during nili plantation 2011 . On the other hand, the highest populations of B. tabaci (97 and 70 indiv./10 leaves) was recorded in 2nd and 4th week of Oct. during (nili 2011/2012) and (81 and 64 nymphs/l0 leaves) in 2nd week of June and July (summer 2012/2013), respectively. For N. tenuis, the highest number (47 ; 39; 50 and 39 individuals/l0 leaves) occurred during 1st and 2nd week of October during nili 2011 & 2012 and 2nd week of June, 1st week of July during summer 2012/2013, respectively. Also, six species of predators were recorded in association with tomato plants, Orius sp., Chrysopa vulgaris ,Syrphus corella, Coccinella undecimpunctata, ..Mantis religiosa and Paedrus alfierii.

Summary in Arabic