NULL

NULL

NULL

NULL

NULL

The work included in this paper involves the synthesis of thirteen heterocyclic compounds, piperidinium and morpholinium 3-cyanopyridinethiolates 5–14, 17, 20 and 21 in our Lab. and their characterization using elemental and spectroscopic analyses. The insecticidal activities of these compounds against cowpea aphid, Aphis craccivora using acetamiprid insecticide as a reference were studied. The bioassay results showed that: (i) the insecticidal activities of compounds 13, 14 and 20 against nymphs or adults of cowpea aphid are about 1.5-fold higher than that of acetamiprid after 48 h of treatment, (ii) the rest of the tested compounds (ten compounds) exhibit weak to strong toxicity against cowpea aphid and (iii) there is a remarkable relationship between the structure and activity of the tested compounds.

We examined the consumption rate of protein diets in caged and free-flying honey bees, amino acid composition of diets, and diet effects on gland development. The effect of seven different diets (sugar solution only, Feedbee®, Helianthus pollen, Sinapis pollen, Asparagus pollen, Castanea pollen, and mixed pollen diet) on the development of the hypopharyngeal (HPG) and acid glands (AG) was tested in caged honey bees. Caged bees consumed the protein diet mainly at the age of 1–8 days, with the highest consumption rate on day 3. Different diets affected the development of both glands. The acini of HPG attained their maximum size in caged bees at an age of 5 days. Bees fed with Castanea sp., Asparagus sp., or mixed pollen had the largest glands among all test groups of this age. The AG sacs of caged bees grew in size between 5 and 12 days and were at day 18 less affected by different protein diets. Castanea sp. and mixed pollen diets were preferably consumed in free-flying colonies.

We examined the consumption rate of protein diets in caged and free-flying honey bees, amino acid composition of diets, and diet effects on gland development. The effect of seven different diets (sugar solution only, Feedbee®, Helianthus pollen, Sinapis pollen, Asparagus pollen, Castanea pollen, and mixed pollen diet) on the development of the hypopharyngeal (HPG) and acid glands (AG) was tested in caged honey bees. Caged bees consumed the protein diet mainly at the age of 1–8 days, with the highest consumption rate on day 3. Different diets affected the development of both glands. The acini of HPG attained their maximum size in caged bees at an age of 5 days. Bees fed with Castanea sp., Asparagus sp., or mixed pollen had the largest glands among all test groups of this age. The AG sacs of caged bees grew in size between 5 and 12 days and were at day 18 less affected by different protein diets. Castanea sp. and mixed pollen diets were preferably consumed in free-flying colonies.

We examined the consumption rate of protein diets in caged and free-flying honey bees, amino acid composition of diets, and diet effects on gland development. The effect of seven different diets (sugar solution only, Feedbee®, Helianthus pollen, Sinapis pollen, Asparagus pollen, Castanea pollen, and mixed pollen diet) on the development of the hypopharyngeal (HPG) and acid glands (AG) was tested in caged honey bees. Caged bees consumed the protein diet mainly at the age of 1–8 days, with the highest consumption rate on day 3. Different diets affected the development of both glands. The acini of HPG attained their maximum size in caged bees at an age of 5 days. Bees fed with Castanea sp., Asparagus sp., or mixed pollen had the largest glands among all test groups of this age. The AG sacs of caged bees grew in size between 5 and 12 days and were at day 18 less affected by different protein diets. Castanea sp. and mixed pollen diets were preferably consumed in free-flying colonies.

Neonicotinoids are the most widely used from all existing pesticides. So, in purpose to discover new pesticides being more effective against the aphid, twelve heterocyclic compounds neonicotinoid analogs have been prepared in a pure state; pyrimidothienotetrahydroisoquinolines 1–12 and their toxicity as potential insecticidal agents against cowpea Aphid, Aphis craccivora Koch was screened. Their characterizations by using spectroscopic analyses were performed. The toxicity data exhibited that the 8-chloropyrimidine compound 4 is more toxic about 2-fold than a reference insecticide, acetamiprid. The other screened compounds showed weak to strong toxicological activities against cowpea aphid.