SUBJECT: EFFECTS OF BOTANICAL PESTICIDES ON APHIDS (Aphis fabae) AND THRIPS (Thrips tabaci) PESTS OF FRENCH BEANS (Phaseolus vulgaris). SUPERVISOR: Dr. DORAH KILALO. SEIF MATI IDRIS A22/0071/2009. ©2013

 The common bean (Phaseolus vulgaris) forms important food and cash crop in Africa.  They are considered the second most important source of human dietary protein after maize and third as source of calories (after maize and cassava) in Africa.  Most beans are produced by small-scale farmers for home consumption.  However, high quality dry and snap beans are exported to markets in European Union EU countries.  Most common varieties are, samantha, julia, amy, etc.

 Due to disease and pest instances which causes:-  poor crop development.  low yields.  The main method used for control is through use of chemicals.  Other problems occur such as:  pesticide resistance.  residual effects on products.

 Certain plants contain chemicals which repel and affect pests presence.  Used in making of botanical pesticides.  Its use is recommended because of:-  Availability.  Adaptability.  No residual effect.  Cheap.

 The main objective entail:- To develop a sustainable management method for controlling aphids (Aphis fabae) and thrips (Thrips tabaci) through use of botanical pesticides.  Specific objective is:- To determine the effects of botanical pesticides (Tagetes tephrosia, tithonia, spider plant and nimbecidine) on aphids (Aphis fabae) and (Thrips tabaci) infesting French beans.

Materials to be used are:  jembe  Panga  Tape measure  fertilizer  rope and pegs  Seeds  Fertilizer  knapsack sprayer Botanicals pesticides which are extracted from:-  spider plant  tithonia  neem plant  Tagetes tephrosia. `

 This is to be carried out at Kabete Field Station.  All agronomic practices recommended are to be carried out.  Establishment of crops is to cater for seven treatment plots at a Randomized Complete Block Design RCBD with three replicates.

Blocks (B) Treatments (T) B1T7T5T3T1T6T2T4 B2T6T2T7T4T3T5T1 B3T2T1T4T5T6T3T7 Key:- T1 – positive control T2 – negative control T3 – spider plant extract T4 – nimbecidine T5 – Tagetes tephrosia, T6 – Tithonia T7 – synthetic chemical (Katrin)

 Physical identification of the pests both the adults and immature stages.  Counting to be carried out and the results put in record.  For the aphids it entails:-  observation to commence after crop establishment in the field.  counting on three meristematic leaves per plant from five plants per plot.

 For the thrips it entails:-  observation to commence during flowering period.  counting on three flowers per plant from five plants per plot.  Parameters such as date and time of collection to be recorded at all times.

 The data will be subjected to the analysis of variance.  Using the Separate Fisders Protected LSD at 95% c.i.  This is to evaluate the effect of the botanicals pesticide on the pests.

Activity Nov Dec Jan Feb Mar Apr May Proposal writing and presentation Exp. Set up Data collection Data analysis Report writing Report submission

ITEMS QUALITY UNIT COST (Ksh) French beans 2 Kg Fertilizer DAP 5 kg 400 Katrin (insecticide) 100 ml 450 Nimbecidine 100 ml 650 Spider plant extract 4 kg 760 Tagetes 4 kg 700 Tithoni 5 kg 800 Labour 12 days TOTAL

ASANTENI.