Question

1. review: in activity a, you determined how to maximize yield for each type of resistance. list the settings you used and the resulting yields in the table below.

resistance type	herbicide amount	insecticide amount	yield
none	0 l/ha	180 l/ha	9.9 kg/ha
herbicide	300 l/ha	180 l/ha	13.6 kg/ha
caterpillars	0 l/ha	0 l/ha	10.2 kg/ha
caterpillars and herbicide	300 l/ha	0 l/ha	13.9 kg/ha

a. how do you think the yields might change over a long - period of time?
b. which method do you think will cause the least amount of harm to the environment? explain.

Explanation:

A. Over a long - term, continuous use of herbicides and insecticides might lead to the development of resistance in pests and weeds, reducing yields. Also, soil quality could degrade, affecting yields negatively. Natural ecosystems might be disrupted, which could impact pollinators and other beneficial organisms, thus reducing yields.
B. The "None" resistance type method (using 0 L/ha of herbicide and 180 L/ha of insecticide) likely causes the least harm to the environment. This is because it minimizes the introduction of potentially harmful chemicals into the ecosystem. Chemicals can contaminate soil, water, and air, and harm non - target organisms.

Answer:

A. Yields might decrease due to resistance development, soil degradation, and ecosystem disruption.
B. The "None" resistance type method as it minimizes chemical introduction into the environment.