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. Author manuscript; available in PMC: 2008 Jun 4.
Published in final edited form as: Crop Prot. 2007 Nov;26(11):1617–1624. doi: 10.1016/j.cropro.2007.01.008

Table 3.

Reasons given for the trends in pesticide use in vegetable farms in Northern Tanzania, 2005

Increasing trend Constant Decreasing trend
Ineffective pesticides Pesticides are effective Good farm preparation
Pest resistance Same acreage, farm size Heavy rains
Increase in pest population Correct instructions and effective pesticides Drought
Increase in pest numbers Drought and same farm Less crop
Increase in insect damage Fewer insect pests Price increase
Increase in farm acreage Same application throughout Reduced farm area
Increase in insect pests Same pesticides used Unavailability of pesticides
Increase in plants