Abstract: This spatial distribut ion of Trialeurodes vaporariorum (Westwood) nymphs, adults and their black “pseudopupa” parasitized by Encarsia formosa ( Gahan) on the cherry tomato was investigated in the sunlight greenhouse. In thelevel of the vertical distribution, the number of nymphs and adults of T. vaporariorum on the upper, tender and fully openleaves was the most, an single average plant is the most respectively reaching at 1. 6, 17; in the level of the horizontal distribution,the adults didn't show an obvious regularity, the larvae underneath the leaning shady- side and the vent plantare the most, an single average plant reaching to 40, but those on the southern plants was the least, an single average plantreaching to only 7.The black 'pupa' which was parasitized by E. formosa was the most on the upper of the plants, an singleaverage plant reaching at 20, in the vert ical distribution; those on the plants in the north were the most , an single averagereaching at 88, but those were the least, an single average plant only reaching to 3. The results indicated that thegreenhouse whitefly larvae and adults were addicted to feed, activity or oviposit on the leaves of the upper of the youngtender and vent ilated plants and the spat ial distribution of the black 'pupa' parasitized by E . f ormosa was approximatelyconsistent in the larvae of T. vaporariorum.

Key words: Sunlight greenhouse, Trialeurodes vaporariorum(Westwood), Encarsiaf ormosa (Gahan), Lycopersicon esculentum MILL. var. cerasif orme( DUN. ) ALEF, Spatial distribution

CLC Number: 

• S436.412