تقييم كفاءة أربعة مبيدات من أصل نباتي في مكافحة الحشرة القشرية الرمادية Parlatoria blanchardi على نخيل التمر مختبريا و حقليا

الملخص EN

The Grey Scales Insects was considered as one of the date’s pests which impact the all date palm varieties and the date itself, To avoid using of chemical pesticides and its negative impacts on the whole agroecosystem, studies have been made to use some botanical pesticides including the commercial formulation of Neem1%, Neem supported by sulphur and potassium (Neem SK 1%), Fytoshine 1% and Cnidiadin (Osthole) 0.4%.

against insect P.blanchardi and at a temperature of 25 ± 2 º m and relative humidity 60-70% laboratory and in field conditions.

Laboratory results revealed that the killing percentages were 100% for the above mentioned pesticides at the concentrations, 2 8 ml/L.

respectively after 7days of the treatments for pesticides Cnidiadin and Neem SK, and (2,3 ml /L.) for pesticides Fytoshine, and Neem.

The impacts of these pesticides were different on the crawlers ranging all concentrations tested ratios killed 100% excludingconcentration (4 , 6) ml/L.

for pesticide Cnidiadin and concentration 3 ml /L.

for pesticide Fytoshine as the percentage relative their effectiveness after 7days of treatment 89, 88 and 90% respectively, The killing percentages of the sessile nymphs were also different depending on the pesticide type, concentration, the duration followed the treatments, being 100% for the Neem SK and Cnidiadin at 1 and 3 ml/L.

for the former and 8ml/L.

for the later after 7 days of the treatments .

Absolute killing percentages were also achieved against adult insects at 2, 3, and 8 ml/L.

for the Neem 1%, Neem SK and Cnidiadin respectively.